BOUSOZOKU  Mozilla Messaging might want to re-write the description since it references the Firebird browser more than once. As I recall, Firebird hasn't been the name of Firefox for years.  
(Version 3.0)

GORDON142  Just as a heads up, if you have any address book contacts with more than two email addresses or think you might have any, stay away from thunderbird. It still after all these years limits you to two emails per contact, unlike basically every other email application in existence. Very irritating.  
(Version 3.0b4)

PROGRAMHAPPY  Developer, can you please add the option to sort all messages in the inbox by EMAIL ADDRESS, not just by "sender"? I run a business, and deal with hundreds of different customers every day. I need to sort by email address! Can you please add an optional "Email" column? You'll be my hero! I'm sure that countless other people would also appreciate this sorting option.

Thank you!  
(Version 3.0b4)

ROBERTCOOGAN  A very capable mail app that is very easy to use. It's biggest strength is in it's thrid-party add ons, making it (almost) endlessly customizable.

Only one minor deficiency - great it has the ability to auto-create Gmail accounts now. This is useless however, if you have IMAP Gmail like I do, for it only creates a POP account. Once I set it up (manually) it works great.

On the whole however, it work great, is very stable, and since I have had MAJOR problems getting Apple Mail to savvy with my IMAP Gmail account, the one I use!  
(Version 2.0.0.23)

XENOS  i really don't understand neither ppl ranting about this and that, nor developers concerned about minor geeky things but NOBODY ever has been giving a sign of discontent about the fact that this application not supporting system services is NO MAC APPLICATION. period.

i'm using it nevertheless, 'cause i'm crazy.  
(Version 2.0.0.23)

MARK EVERITT  I'm not sure about version 2, but 3 beta allows simple importing of mailboxes. Surely you don't have to be a software nerd just to copy over account details!  
(Version 2.0.0.22)

AMALGAMATED INC  Developers, I suggest moving IMPORTING function to the TOP of your to-do list. One would think if the development team wants ppl to be able to TRY their app, the first thing they would think of would be "hey lets give them an easy way to get their email into it!". No I don't want to root around in Library folders to copy mail directories to TRY your app. Nice idea, but no way to try it.   
(Version 2.0.0.22)

MAC MAIL  This version 2.0.0.22 was created June 5, 2009. What's new with today's v2.0.0.22? Is it what they call it as RI (reissue)?

What's up???  
(Version 2.0.0.22)

ORDER2  Rev. 22 has severe difficulties deleting big mail attachments like picture files, resulting in application freezes ("beachball of death"). Had to force quit Thunderbird several times. Reverted to Rev. 17, everything's gone back to normal. (Tiger 10.4.11 on PPC G4)  
(Version 2.0.0.22)

YOSHINATSU  Been a long time since they started developing version 3, and we're still getting version 2 updates...?  
(Version 2.0.0.22)

ZWIGGYBO  I love the new version (3). Tabbed browsing of messages should open on apple-click, but still a nice feature.

I prefer this for newsgroups/list, and version 2 has always been good to me, and so far version 3 is good too.  
(Version 3.0b2)

ALBION  Complainers:

Thunderbird, Apple Mail, and other GUI apps for email will never fail to disappoint, because they try to do too much. Apple Mail is the best of the lot, but like every other featureful mail client, it suffers from feature-itis, and it will eat your mail now and then, given a chance.

Google Mail, for better or worse, is the right thing for most people, and you don't need a bloated, craptacular email client to use it. Client programs are just another 100 things to wrong. You already have to use a bloated, craptacular web browser anyway, so why use another one for email...

Try Fluid or Prism if you really need to have an icon in your dock for your email application.

(No, I'm not shilling for Google. Like you, I resisted switching to web-based email for a long time. Now I wonder why I ever put myself through the pain of storing mail locally. That is all.)  
(Version 2.0.0.19)

PLANET  I'm using Thunderbird 2.0.017 at home with MacOS 10.39 (G4 MacOS 10.39 1.2 GHZ) and at work with SUSE Linux (Dual 2.4 GHZ Intel) for about one year. At home I still have an old 300 MHZ G3 BW with Outlook Express and MacOS 9.21. What can I say, OE on the old machine is twice as fast, Thunderbird is way too slow and it can't show the replied messages. My personal conclusion is to downgrade to OE. One year is more than enough, sorry.  
(Version 2.0.0.17)

PENGUIRL  Looking for a separate e-mail client for my work account I decided to try Thunderbird again. It's been a few years since the last time I used it and not much has changed. Still unable to import anything at all at launch, and Thunderbird still uses far too much of the CPU. 11% +/- 1% at idle on my DP G5 2.0GHz. Might be okay for some, but being a dedicated BOINC cruncher I am not going to throw away my CPU cycles on an idle e-mail client.

I can't get Mulberry to play nice with gmail, so it's back to Correo for now. Maybe in another decade Thunderbird or Eudora will be ready for prime time.  
(Version 2.0.0.17)

ZX81  I use Thunderbird as a "second" mail app. The only thing I can say is that it works but my main complaint is that it is VERY SLOW ; I get the "rolling ball" for about 2 seconds every time I just open a new or even old mail, select the inbox folder, etc.

I'm now looking for another free mail app that integrates SpamSieve. Any suggestion?  
(Version 2.0.0.16)

SHATFIELD  Open the address book from Thunderbird and click "New Card".

Look at the Internet section of the card...

Email

Additional Email:

Screen Name:

Done.

WTF?! Where is the ability to add as many email addresses as I want to a "card"? Additional "screen names"?

What a joke.  
(Version 2.0.0.14)

MAC MAIL  As long as the 'BCC' button (extension) is not updated, I will not use Thunderbird. Just one little button, Thunderbird has not done anything (for Mac) since version 1.0.7

What a disappointment!!!  
(Version 2.0.0.12)

SPARTAN  Disappointed by Apple and Leopard, I wanted to switch from the Apple suite to a more open set of tools, because I'm not sure my next computer will be a Mac... after being an Apple fan since 1984! Will Thunderbird replace Apple Mail? I don't think so. Like ETNIER, with Thunderbird 2.0.0.9, I have the message: "Import Preferences, Account Settings, Addressbook and otherdata from: Don't import anything". Good joke.  
(Version 2.0.0.9)

ETNIER  On launch I was presented with an astonishing dialog box: something to the effect of "Import my address book, settings and folders from: NONE": there was no choice made available. After that I poked around trying to see how I'd import my Mail boxes and settings and AFAIK it can't be done.

Too bad: I was under the impression that this (V2.0.06) was a mature product.  
(Version 2.0.0.6)

XYPHER  Mail died on me suddenly.No matter what I did it wouldn't accept Certificates from AOL and I panicked.This was the only program that saved my skin!

Full marks.  
(Version 2.0.0.6)

EL PUMA  Just updated T-bird to 2.0.0.6 - now it hangs up on start - white page w/permanent beach ball you have to force-quit to get out of. Canned the stored (updated) version, downloaded entire new program, same result...any ideas?

Cheers-

El Puma  
(Version 2.0.0.6)

AMALGAMATED INC  Please move IMPORTING function to the TOP of your to-do list. One would think if the development team wants ppl to be able to TRY their app, the first thing they would think of would be "hey lets give them an easy way to get their email into it!". No I don't want to root around in Library folders to copy mail directories to TRY your app. Nice idea, but no way to try it.  
(Version 2.0.0.5)

DONMONTALVO  I've been using Thunderbird since Eudora was taken out back and shot. I'm impressed. It does what I need plus.

Some issues with fiters (can't seem to kickstart all filters - have to trigger each rule per folder).

Don  
(Version 2.0.0.4)

M!K3  I'm using Thunderbird since a couple of years on Windows. It was naturally, that I give it a try on the Mac. Unfortunately, it is not as good usable as I'm used to it. Is it just me that I can't easily switch between windows (e.g. from main window to new-message window) with the usual keystroke?  
(Version 2.0)

M.U. MOORE  My favorite! Stable, many useful features but not cluttered with useless options - I use it several hours everyday and wouldn't change it for anything currently out there.

Automatic junk filtering also works pretty good, keeping me from manually deleting spams most of the time.  
(Version 2.0)

TUISHIMI  Has anyone noticed that with the released version sometimes different functions step on one another? This did not happen in the last beta version I ran. In this version when it is checking mail for my various mailboxes, and filtering and I try to do something (like read a message) it starts popping up message boxes saying it is busy doing something else!!

I also have SpamSieve running with it as well.

Am I crazy? Alone?  
(Version 2.0)

MARUKO DRINKING TEAM  So, do you walk around town repeatedly posting the same sign at gas stations, too?

"You gas stations need to put this AT THE TOP OF YOUR TODO LIST! You need to bring back NON-UNLEADED GAS FOR MY OBSOLETE CAR! Your gas station is WORTHLESS until you do the obsolete thing that I want!"

It might be nice to have an import function for Mail, but I guarantee you that the rest of us who are not living in the 1980s before IMAP email would rather the Thunderbird team spent the effort making the UI more Mac-like, or some other more useful thing.   
(Version 2.0)

AMALGAMATED INC  You guys need to put AT THE TOP OF YOUR TO-DO LIST... an IMPORT MAIL FUNCTION for Apple Mail.

No one wants to deal with rooting around in Library folders and mbox files to *try* using your App!  
(Version 2.0)

MARUKO DRINKING TEAM  What is wrong with you people? Are you stuck in the stone ages and still using POP mail? Use IMAP and you don't need any stupid import functions. Mail clients don't need import functions for other mail clients. That has been totally unnecessary for almost ten years. Even if you don't have IMAP, sign up for .Mac or some other IMAP provider temporarily. Then just sync both clients to the same IMAP server. Sheesh.  
(Version 2.0)

ITTY  I would love to use this app. but without an Apple Mail IMPORT function, it is utterly useless.  
(Version 2.0rc1)

GUAMAN  I am a Entourage user. When Thunderbird designs a better IMPORT and EXPORT than the Mickey Mouse one they now have to import Entourage addresses,files and everything else, I will then get serious about changing to Thunderbird  
(Version 2.0rc1)

AMALGAMATED INC  You guys need to put AT THE TOP OF YOUR TO-DO LIST... an IMPORT MAIL FUNCTION for Apple Mail.

No one wants to deal with rooting around in Library folders and mbox files to *try* using your App.  
(Version 2.0rc1)

MACINEN  I really like the feel of this program. But I'm still not sure this is THE one for me. I'd like to see some better mail notification for new messages - the extension iAlert has not been updated to Intel and Growl is too big for just this program. Something like the "Mail Notification"-extension for Mail.app would be great.

You promise this feature: "Improved New Mail Notification Alerts: New mail alerts include information such as the subject, sender and message preview text." Now, where is it? I can't find it; In preferences there is only icon animating and sound for new messages?  
(Version 2.0rc1)

DONMONTALVO  quoting is still a mess, but still a great project. not "owned" is a good thing in this case. the opensource community works together to bring us a free email client that (despite its minor glitches) beats everything else out there. sure, entourage has "ties" to microsoft office...but do you REALLY want that? apple mail has "ties" to osx...again, do you REALLY want that? i think too much focus is in integration when sight should not be lost on core functionality. functionality should not be tied to anything (remember the infamous court case against microsoft regarding i.e.'s ties to windows?).

give us quoting that properly wraps (i spend TOO MUCH TIME ediging quoted text because if thunderbird's inability to properly quote/wrap quoted text). no plugin/addon/extension available that cleans up the quoting mess.

filtering is still a crapshoot - sometimes it kind of works, sometimes you have to manually run filter on each folder...a huge drag.

not without faults...on the other hand, without dependancies. :)

don montalvo, nyc  
(Version 2.0rc1)

SCOTTISHWILDCAT  RSS works fine here, although it's a pretty limited feature compared to standalone RSS readers like Vienna or NetNewsWire. Just choose "RSS News and Blogs" in the Create New Account window.   
(Version 2.0rc1)

DRADRIENYOUELL  To TRIGGERFISH,

Apple Safari supports RSS.  
(Version 2.0rc1)

TRIGGERFISH  anyone been able to configure thunderbird (osx) to receive/subscribe to rss feeds?

is this a windows only feature?  
(Version 2.0b2)

PLANET  Thunderbird looks good and has plenty of interesting features like Spamfilters etc. but the real basics like sending mail are still buggy and annoying like in all Netscape builds I´ve ever tried.

I still can't see any mailclient for MacOS X that is only approximate as simple and fast as Outlook Express 5.06 for MacOS 9.

One thing is for sure: neither Apples mail nor Thunderbird is the one I get lucky with. Therefore I still use MacOS 9 for Web and mail.  
(Version 2.0b2)

THREEDEE912  "The bug will be fixed in release 2.0"  
(Version 2.0b1)

JDMYERS  Is Thunderbird slow for anyone else when you delete a mail message with an even moderately large attachment, say 2 MBs? Quite annoying. I just wanted to see if anyone else saw this.  
(Version 2.0b1)

OSXFACTOR  Been using the 2.0 beta nightlies for about a month now for my work email. They are solid. My only gripe is that the Mac OS X version doesn't have the visual notification window option like the Windows version does. Otherwise, a very big step for Mozilla Thunderbird.  
(Version 2.0b1)

MOK.IN.TOUCH™  I'm still staying at v1.0.7 due to all the craps in v2+.

Also the BCC button (extension) has never been updated.

I refuse to update Thunderbird beyond 1.0.7 due to the BCC button. After all, the v2+ is not any better at all.

That's the way I see it.  
(Version 2.0b1)

ERIC WOEHLER  Found the solution for SLOW opening etc on mozillazine forums under the topic 'slow opening':

"There is a current bug which adds spurious lines to your pref.js file every time you open your address book, or load the contact sidebar. When enough of these amass, they can slow down initial address book/contact sidebar loading. See https://bugzilla.mozilla.org/show_bug.cgi?id=230580

The bug will be fixed in release 2.0. Meanwhile, you may need to clean out your prefs.js file to remove the spurious lines.

With TBird CLOSED, go to your profile, and make a backup copy of your prefs.js file that you can revert to in case of problems. Then open prefs.js in a plain text editor (NOT a word processor like MSWord, Windows' Notepad will do). Find and delete any line with the string servers._nonascii_ in it. If it has gotten bad enough for the slowdown to be noticeable, you probably have hundreds of them.

Save the file under its original filename and location. If the editor you're using gives you a choice of formats, choose plain text or ascii."

IT WORKS: the original posting was by 'makaiguy ' - for further info, search the forums for "slow opening" - just passing on the info to others who are experiencing this bug..

solution above works - I had almost 2000 lines of junk in my prefs file. deleted them and Thunderbird is back to its snappy self.  
(Version 1.5.0.7)

ERIC WOEHLER  Thunderbird 1.5.0.7 on black MacBook (dual 2Ghz proc, 2 gigs RAM) and is dog-slow. 30 seconds on startup, upto 20 seconds to open address book [  
(Version 1.5.0.7)

MACMEND  Most emailers get a foothold by being able to import from other email applications, this just doesn't cut it at the first hurdle.

I have 9 active accounts, rules, signatures and thousands of emails and addresses. No way am I going to do that all manually to find out its not as good as mail.app  
(Version 1.5.0.7)

DONMONTALVO  need thunderbird to feed off apple address book to give us the tight integration we expect on macs. it's also very slow.

don  
(Version 1.5.0.7)

BOB_TM  AFAIK the best mail client for OSX. Great spam filter - can do all I require it to. Still, the GUI is amazingly slow.   
(Version 1.5.0.7)

M85  Terrific alternative to Mail (still primary for my wife's computer since she has minimal email requirements) and Outlook (which I have to use for work)  
(Version 1.5.0.5)

FOULGER  Still waiting for Import from and also to have unread messages in a custom colour would be nice, the only thing I miss about entourage!  
(Version 1.5.0.4)

MOK.IN.TOUCH™  I will not install any version that's above v1.0.7 coz the extension of "Contact Add BCC Button" has not been updated for a long time. That's my preference.

Too bad!  
(Version 1.5.0.2)

PROGRAMHAPPY  SOS! Please add the option to sort all messages in the inbox by EMAIL ADDRESS, not just by "sender." Why is this not a standard sorting option? I run a business, and deal with hundreds of different customers every day. I need to sort by email address! I'm sure that countless other businesses would LOVE this sorting option. Thank you!  
(Version 1.5.0.2)

INSTANT RUNOFF  You can use Plaxo.com to keep Address Books in sync. It works with Thunderbird and the Mac OS X system Address Book.  
(Version 1.5)

RUMPLESTILTSKIN  Needed a newsgroup reader that would maintain thread integrity. I use Entourage as my main eMail client but Entourage uses -EXACT- subject naming to determine threading; any alteration of the subject and it's a new thread. Well, that just doesn't work!

T-bird works great for this. I teach and desperately require consistent threading to track my students responses and T-bird delivers. I also keep my imap account for school "business" within T-bird and, again, it works as expected. HTML mail and postings are properly supported from Mac and PC posters. Can't ask for much more at this time.

While there may be more features I am not using, I'll give it a 5 because the features I -am- using are working great.

While I'm not ready to switch everything over from Entourage (due to its calendar, contacts, notes, and sync'ing ability with my Palm), T-bird is excellent for my requirements.  
(Version 1.5)

SHERMAN  Lots of people comment on the lack of import of contacts, and many others point to one-time import solutions such as Java apps.

I think it's important to point out that a one-time import of contacts is NOT SUFFICIENT. Many of us use the Mac AddressBook to sync to our PDAs. We need either a tight integration between TB and AddressBook that goes both ways, or else conduits for syncing the TB address book with Palm PDAs.

Until this happens -- and until I can easily import messages from Mail -- I cannot even consider switching, even though many of the other features of TB are especially appealing.  
(Version 1.5)

PERLMONKEY  I have tried out almost every email client for Mac OS X. After half a year with Opera's M2 client I decided to give Thunderbird a spin. After a couple of days I find TB to be ok, but not great.

First of all, the addressbook issue (which I am not going to waste another word on, see the other comments). Secondly, checking for mails seems somewhat slower than with Mail.app and M2. Sometimes, e.g. when saving a draft and then trying to cancel it, a dialog mentions the word "quit" which I think should be reserved for leaving the program, not for aborting some operation.

Overall (and I have more of those little annoyances) I find ThunderBird to be one of the acceptable email clients for Mac OS X. Unfortunately there is no real good client available that supports both POP3 and IMAP.

I tested Version 1.5 (20051201) on Mac OS X 10.4.3.  
(Version 1.5rc2)

JOJOMAN  Few things worth mentioning about this software:

Good:

1. This is a very nice email client, featrue is very complete. Interface (even though it is not coca), workes very well for me.

2. Extension system worked out quite well, I've installed half a dozen extension already, and features such as auto image zoom, header display hotkey, Maximize message pane, remove duplicate worked out very nicely.

3. Editor for writting email is quite good, table, outline numbering etc works well.

4. Free

5. I have roughly 1.2GB of mails in total, 1500+ messages and the speed is adequate, faster then Apple Mail.

6. Search within pre-defined is very, very fast.

Bad:

1. I can create email template, but cannot effectively use it with reply, forward, redirect functions. In TB, you cannot specify which template to use for certain action, so I don't use template at all. Default template is what I have to live with now. And it cannot be edited from the TB software directly.

2. Address Book is the worst I've seen, feature wise is actually very complete, but TB address book is totally isolated from the rest of the Mac world. ldif file for transfer is not effective with Chinese characters. Previous post spoke enough about this shortcomings.

3. Message filter cannot use script

4. Help is offered thru web, forum etc. But the forum is so tangle up with all the other Mozilla projects, very difficult to navigate inside to find what you need.

5. Search within message body is very slow, I cannot compare with Mail but both are slow. Try to search using pre-defined fields such as TO, FROM, etc. whenever possible.

6. There isn't a proper vcalender support, Mail does this nicely and I can get the vcalender file created on Outlook PC direcly into ical. TB shows the file in plain text, I need to copy it to another word processor, save it as UTF-8 plain text, under the file extension .ics then double click it to get it into iCal. (typing the schedule directly in iCal is faster)

7. Calender extension in TB is not updated so I cannot use it with TB 1.5rc2. Mozilla SunBird doesn't has the same problem as iCal, so no help there.

8. iCal schedule cannot be sent directly using TB, as matter of fact, iCal can only send using Apple Mail. Not the problem of TB but this shoudl be the problem of Apple iCal. The default mail program is simply ignored by iCal.

Having said all that, I've switched from Mail to TB week ago. The reason is that I got the disappearing message problem back (yes, it happened before) and I am starting to get duplicates messages.

This time, I cannot fix the problem with Mail using the old method and I don't want to spend my time again to find out how to solve this.

If you are looking for Apple Mail alternative, give this a try, address book is a big killer here but fortunately, TB remembers the address you type, do an initial import of your current address book, and after a week of using it, I can live with it.  
(Version 1.5rc2)

FOULGER  Dear Santa,

Here is my Xmas wish list (1) Able to import from (2) Address book integration.

When you have done that you can charge for the program and I will buy it and use it.

Once the Xmas rush is over, can you get your elves working on it?

Thanks so much  
(Version 1.5rc2)

PITERPAN  This should come on Apple Address Book... oh well...

This java app will convert Apple's Address Book vCards files into .ldif files that Thunderbird can read. Set the option to read as UTF-16 works great.

http://mills.zapto.org/projects/vcf2ldif/  
(Version 1.5rc1)

SPAMMY  I would really like to use Thunderbird as I love the look and feel of the program but, I have several email personalities and I just can't figure out how to set them up in Thunderbird. It's dead easy in my current email program so, why does it have to be so difficult in Thunderbird?

Go on Mozilla. You produce great software and it shouldn't be too hard for you to make setting up multiple personalities much easier. I can't make the switch until you do.  
(Version 1.5rc1)

ANONYMOUS  For gods sake, how many people need to request Address Book integration before somebody actually takes us seriously? This app is perfect in nearly every well except this one essential feature. It's like buying a car that doesn't support wheels.  
(Version 1.5rc1)

ANONYMOUS  It's stuff like the reviews of Thunderbird here that really make me shake my head. It's free. It works wonderfully. It's stable. It's fully featured. It's free.

A lot of people spent a lot of time on the development of this application and it's pretty damn close in both quality and features to other commercial email applications. Does it have some way to go? Of course. Is it ususable by 95%+ of Mac email users as is without too much trouble and no cost apart from setup time? Yes.

Get the chips off your shoulders and give credit where credit is due. Sheesh.  
(Version 1.5rc1)

ANONYMOUS  NOT OS X NATIVE

Can't these people at Mozilla use Xcode like the rest of us?  
(Version 1.5rc1)

ANONYMOUS  Thunderbird is a nice application - it looks great, runs fast, and has many great features. It does pretty much what any great email client should do, and then some.

Unfortunately (depending on your viewpoint), one of those features is not integration with the native Mac OS X Address Book application. There is also no easy way (yes, CSV works, but egads! Who wants to deal with that?!) to import contacts from the AB to Thunderbird, so you may have to spend some time getting things going.

I can see why they don't provide this service though... because there is a huge benefit to using Thunderbird's built in mechanisms. If you ever want to "jump ship" to the Windows or Linux platform, it would be very simple to do so -- just copy the files into the appropriate directories on the other platform and you're good to go. Moving from Outlook or Mail.app would be much more difficult.

So depending on your level of comfort with corporations using their software applications to lock you into their platform (both Microsoft and Apple do this), you may want to consider going completely open source with both Firefox and Thunderbird.

Otherwise, you may want to just stick with Mail.app and AB.  
(Version 1.5rc1)

FOULGER  Getting better BUT

(1) No Import from Mail

(2) No efficient automatic junk filtering  
(Version 1.5rc2)

ANONYMOUS  If Thunderbird was a woman, she'd have to buy me a multi-million dollar mansion before she could even think about getting next to me.  
(Version 1.5beta2)

THEBRIX  Thunderbird has come on in leaps and bounds since 1.0 - the HTML support, threading display, message filtering and junk mail filtering are superior to those in Apple Mail 2.0 and, as well as a lot of finesses, there are some major features not in Apple Mail such as NNTP and RSS support and a neat feature to trap phishing emails. I am also impressed with the speed, which has improved greatly since earlier versions and is the fastest I have come across for encrypted POP (gmail, gmx), and the user interface is much more "OS X-like" and, really, has very little different from a native OS X application.

The big downside is that there is no single-click import, either of settings or of mail, from several major OS X email applications (all versions of Apple Mail, all versions of Entourage, ...). I did the import from Apple Mail 2.0 by hand (look on this site for "eml to mbox converter" as a start) and, although it took about 30 minutes to complete and only had to be done once, it was not easy.  
(Version 1.5beta2)

MATT  Excellent as always. I have never had a crash and the features are simply the best. Fast and efficient.  
(Version 1.5 beta1)

ANONYMOUS  For an IMAP account Apple's mail just does not compare. Apples mail was unable to import my old Eudora mailboxes correctly, but Thunderbird did it perfectly. Thunderbird also easily handles multiple accounts easily -- I've got my pop account in it at work as well. The settings are not as easy to decipher as mail, but they are getting easier with this release. They are similar to the netscape settings of course, so if you are familiar with those from way back when then you'll feel at home setting up Thunderbird. My only complaints are occasional crashes and some non-intuitive preference locations for setting up an account. All in all, the best mail app on X right now.  
(Version 1.5 beta1)

ANONYMOUS  When I upgraded to 10.4, it was the last straw. The input cursor and the actual text input no longer line up, making editing messages almost impossible.

I checked out Apple's Mail app and it does what I want and exchange client to do, faster and smoother than Thunderbird.

I've just binned Thunderbird.  
(Version 1.0.6)

TOM WIBLE  it imported all my mozilla mail & settings (i should hope...that's why i don't bother w/ apple's mail.app;-)

so where's the next unread msg button? only the F/B keys? ok, i can live with that, i like the reply flags...

so i try to get msgs, it asks me for my passwd (guess they didn't import)-: but i can't type my passwd: certain letters are captured to select prev.& next msgs:-P

i trashed that p.o.s. right away...  
(Version 1.0.5)

ALDORR  What's with the small "t"?  
(Version 1.0.5)

ANONYMOUS  Slow and cumbersome, whatever convoluted GUI code is still lurking in Mozilla spin off apps it's not helping.

Nothing particularly wrong with Thunderbird functionality wise that I can see, but it's pretty dull.

That said, Apple's Mail in Tiger is such a complete and utter mess that I wouldn't blame anyone for looking elsewhere.  
(Version 1.0.5)

MRANDRE  Here's another obligatory "get off your asses and give us address book support" request. Isn't there already a patch? Patch it!  
(Version 1.0.5)

ANONYMOUS  As long as Thunderbird is written in anything other than Objective C, it will always lag in performance and "useability". Mail may not have as many features, but is so much faster for most uses. Thunderbird is a good backup.  
(Version 1.0.5)

ANONYMOUS  I wonder how many THOUSANDS of people would switch to this program if they just added address book support. Practically every post requests it!   
(Version 1.0.2)

ANDREW  Thunderbird works very well for both my IMAP and POP3 mail accounts. As much as I like Apple, I absolutely HATE Safari and Mail.app, so instead I use both Thunderbird and Firefox. The only thing I have been unable to get to work on Thunderbird is the custom New Mail wav sound option. Any ideas?  
(Version 1.0.2)

ANONYMOUS  Thunderbird is a lot faster than Mail.app for IMAP access. In fact, it is even faster for checking IMAP mailboxes than the specialist Mulberry client from Cyrusoft. Changing settings and learning keyboard shortcuts takes a little bit of time, but Thunderbird is a powerful, fast and free email client once you have it set up. There are some UI quirks that should be worked out sometime soon, but these are not much of a nuisance compared to the flakiness I experienced with Mail.app (which slowed to a crawl after the 10.3.9 update). For an IMAP email account, I also recommend Fastmail.fm  
(Version 1.0.2)

ANONYMOUS  Downloaded Thunderbird.Nothing happened !Nothing reacted apart from constantly being asked about my password(?)

Must have downloaded the "wrong"version.

Import section could definitely be improved!I don't see any reason why I shouldn't stick to Entourage.  
(Version 1.0.2)

ROB  Excellent software. Well designed. BUT no convenience of address book access!!

Maybe soon?  
(Version 1.0.2)

ANONYMOUS  Vote for this BUG:

https://bugzilla.mozilla.org/show_bug.cgi?id=203927

It is to add Address Book support to Thunderbird. (However, please don't harrass the developer by posting unnecessary comments. Just vote.)  
(Version 1.0.2)

STEFPIX  Thunderbird has features that Mail lacks.

labelling of messages. Virtual folders. Better Junk Mail filter. better html email. Some handy extensions.

The Virtual Folders are actually a great tool that can be used to group email that meets certain criteria without having to move the messages,

Mail.app would often loose the status of the message when I was low on Disk Space. All my inbox would turn into unread.

happened too many times.

Mail hase some good aspects that Thunderbird lacks. So it is just a matter of priorities.  
(Version 1.0.2)

ANONYMOUS  Do you know there all these mac wannabe apps out there, but none work with the address book. My mobile bluetooth phone works with the address book so any ANY mail app must use the address book until then its so much crap filling my harddrive. Software like this has to offer something more than Mail.app, what does this software offer?  
(Version 1.0.2)

JERRY_MINNEAPOLIS  I really like this app - however, there's no easy way to migrate from Mail.app. You have to go into each .mbox file and search inside package to find the core mbox then copy it, rename it and drag it into the corresponding folder for Thunderbird. Plu sI have so many rules set up in Mail to filter mail into various folders - this would take forever to sit and re-enter. Plus, there's also no easy way to import addresses from Address Book - and when you do - everything i s garbled and in the wrong place. I'd love to use this application - but please work on a Mail.app migration tool. PLEASE. Thanks. Also, sometimes the toolbar menus stick while open and won't close unless you close the viewer and open an new one - same with a message window. I give a 3 for features because of no Mail.app migration tool. Stability is a 4 because sometimes when opening a new compose message I get a spinning beachball for a couple seconds. Overall I think this app is a 5.  
(Version 1.0)

RICHARD  Get it to seamlessly import from OSX Mail.app and have it work WITH the Apple Address Book (not try to replace it) and you'll get switchers left and right, myself included. But if it's a new pain in the a-s (which it is right now)....I'm out. Keep working it though! It's getting better!  
(Version 1.0)

ANONYMOUS  Very Good BUT cannot import address from Apple Mail- only in theory!!!!  
(Version 1.0)

ANONYMOUS  OMG! I can't lick the bubbly goodness off of all the interface elements of this! What a crappy program! God knows if it doesn't reak of aquaish brushed metal gumbdrops I'm going to kill myself if I have to use it!

Want an email program that looks exactly like Apple's Mail? Use Apple's Mail. Want an email program with enough features so you can actually get some work done? Use Thunderbird.  
(Version 1.0)

ANONYMOUS  I tried to like Thunderbird as well, but it doesn't work well with non-Roman letters. They all come out as Unicode numbers.  
(Version 1.0)

JOHN  Ugh. I really want to like this, but there's just too much wrong with it. Forget importing your Mail or Address book stuff. In fact, forget using the OS X address book at all because this app has it's own :/

On top of that, it's VERY Windows-like and quirky. Too much use of OS X sheets for preferences windows - you spend a lot of time waiting for things to appear/disappear.

You must have mailbox folders open to view mail and the screen displayed when you click on each account reminds me of Outlook and is useless.

I had a heck of a time figuring out what settings needed to be made to get my passwords to work with each particular mail server (something I've never had to do before).

... and there's just too much more to mention. Sorry Mozilla, but I think we'll have to wait until v5 until this can compare to OS X Mail, Eudora or Mailsmith.  
(Version 1.0)

LETTERPRESS LOUIE  On a G3 Mac, this application crawls, stutters, doesn't recognize account settings, asks for passwords over and over and over again.

These problems haven't occurred on this machine when using Mail, Eudora, Power Mail, Musashi, Gyaz Mail, etc.

Love Firefox, but this? Too big, too slow, too erratic. Too bad.  
(Version 1.0)

ROB  This is a cool one BUT everytime there is an upgrade you lose most of your extensions and themes. It takes a while to catch up with updating.

They should coordinate upgrading.  
(Version 1.0)

ANONYMOUS  Since updating, I've experienced frequent crashing and strange characters replacing menu items.  
(Version 1.0)

WATERBOY  mail migration and address import are 'comprehensive' so the folk at Mozilla say. This means Eudora and Communicator. It's a great email client, but until it recognises the existence of Apple Mail and Address Book it seems a little premature to release it for Mac OS X.  
(Version 1.0)

ANONYMOUS  What kind of mail clients work with Thunderbird? I have Yahoo right now and I know that doesn't. Do I have to pay for something?  
(Version 1.0)

ANONYMOUS  In the OS X Address Book I run one Address Book with multiple groups. When I tried to create this in Thunderbird's own Address Book, it creates the list but when I add an address to the list it creates second or third address entry so that I end up with multiple email addresses in the main list.

I like this a lot... however the lack of Address Book compatability and problems with their own Address Book mean this is not yet for me. Roll on the Official release.  
(Version 1.0rc1)

TWISTERMC  Are the stripes in the inbox new? I think so and their so nice. Either that or something has changed and made this much easier on the eyes, and it was easy before. GREAT UPDATE!!  
(Version 1.0rc1)

DEACON NIKOLAI  I like it a lot. I wish it had seamless Address Book integration, but other than that it is much more than Apple's Mail.app IMO.  
(Version 1.0rc1)

CHICKENHEAD  Thunderbird is looking very, very good. This RC is the most polished, well designed client released yet. In places it looks, feels, and smells very much like an OS X app, while in others (like the preferences and what-not) it has that old Netscape look. Regardless, it works quite well, and I could easily see myself switching to it. But that won't happen until *seamless* OS X Address Book support is added. I'm too addicted to using Mail / .Mac syncing to switch.  
(Version 1.0rc1)

PL  Nice features but needs work. It's very buggy if you try to write in rich text/html format. When typing the characters appear 7-8 spaces to the right of the cursor...   
(Version 0.9)

BEN HOYT  Has very good features, but I've been using Outlook Express till now, and Thunderbird is tons bigger and slower. It eats memory and CPU, whereas OE is quick. I was much more impressed with Firefox over IE than Thunderbird over OE. But TB's features still just outweigh its bloat, and hopefully it gets better.  
(Version 0.9)

ANONYMOUS  Seems good, mails are imported from Mail.app but links to files are lost. If it can't import properly, it is useless.  
(Version 0.9)

ANONYMOUS  Thunderbird is the only GUI mail client that doesn't make me 'pine' for mutt..  
(Version 0.9)

ANONYMOUS  Love it. Fast and stable on Exchange server.

Cmd-m finally minimizes instead of creating a new message. Appreciate the adoption of Mac-centric touches. No love lost with Mozilla suite, Mail.app or any other program.  
(Version 0.9)

ANONYMOUS  Faster than Mail (although Mail's slowness is partly self-inflicted with that stupid fading every time I switch messages). Better than Mail. I've been using 0.8 for a couple months now and haven't looked back. Can't wait to try this version.  
(Version 0.9)

ANONYMOUS  Thunderbird doesn't delete old messages, they are all stored under /User/Library/Thunderbird/Mail/. As long as they don't fix this bug I am using Mail.app.  
(Version 0.9)

RONAN  If you're on an Exchange server, this app is many times better than Entourage, at a price that can't be beaten. I'm on a slow old G4, and have no complaints about speed, except a curious hesitation to open a 'compose new mail' window.

Stable, ergonomic - I have to disagree with the last poster. I like it, and development is logical and moving quite swiftly.  
(Version 0.9)

ANONYMOUS  Very nice e-mailclient. I would use it for sure, but not without using my e-mailadresses from apple adress book. Please make us happy!  
(Version 0.8)

LEOPATRA  I Want Apple Adressbook integration. Before that, its not usefull for me !  
(Version 0.8)

ANONYMOUS  No integration with OSX Address Book

No integration with OSX Address Book

No integration with OSX Address Book

No integration with OSX Address Book

No integration with OSX Address Book

Do I need to repeat myself?  
(Version 0.8)

DAVID  I love Thunderbird. It (and the mail component of the Mozilla suite) is my favorite mail client at this time. Very nice work! Love the new RSS support.  
(Version 0.8)

ANONYMOUS  Totally unintuitive, but found the answer to profiles here:

http://kb.mozillazine.org/index.phtml?title=Thunderbird_:_FAQs_:_Profile_Manager  
(Version 0.8)

ANONYMOUS  I can't review this till I know how to access the profile manager... anybody help plz? If I can't it's getting 2 stars.  
(Version 0.8)

WING  One of the best mail clients... Ah, Ubib, Apple's mail DOESN'T beats it. It doesn't supports full X.509 certificates (nor signing, not ciphering) and many other things.  
(Version 0.8)

STEFANO G  I switched to TB 0.8 [nightly builds] and it is really good.

I liked Mail.app but it would not delete the messages on the mailserver when I would delete or move them from my inbox as I set it in the options. and I was sick to lose the meddage status [flags/replies etc] everytime i would run low on disk space.

TB has some great options that mail lacks [labels/priorities/html mail]and works really fine.

I miss the virtual folders of mail and some incoming attachments features -

and well i wish TB could use or at least sync with Apple AddressBook -

but well it is constantly developed and it will get better. So far I am happy with some reserves - but it never reverted all the messages to "Unread" as Mail often did.  
(Version 0.7.3)

BISTRO  I quite like this program having tried it out a few times and worked with it pretty heavily in the last few days - but (as with firefox) its lack of integration with the overall OS kills it. Who wants two address books to maintain, for example?  
(Version 0.7.3)

PAUL BOWERS  This is the most over rated piece of bloatware I have ever seen. I have a G4 Mac, keep it well maintained, and it takes this email client "forever" to load. It crawls along, and the performance, in my estimation, is marginal at best. While I'm at it, I want to say that while there are some good email clients out there, such as "Gyaz", and "Sweetmail"...for me, I'm going to avoid this one like the plague. Free doesn't have to mean sub standard...  
(Version 0.7.3)

ANONYMOUS  It says "FREE"...why do they want money?

It should say "shareware"!  
(Version 0.7)

ANONYMOUS  I AM SICK OF IT . mail.app is back up  
(Version 0.7)

TIDRION  Anyone else getting sick of them moving the dang prefs folder. One more time and I'm going back to Mail.app until version 1.0

New folder location

~/Library/Thunderbird/default.ajr/  
(Version 0.7)

TIDRION  To get your old profile back, go to

~/Library/Application Support/Thunderbird/Prodiles/default.pyb

Move all of the files and folders there out into a different folder (we don't want to trash them in case something goes wrong) Then copy all the files and folders from inside your .slt folder inside of ~/Library/Thunderbird/ to the .pyb folder in ~/Library/application support/thunderbird/

Launch thunderbird

!!! NOTE !!!

IF YOU HAVE ANY OLD EXTENSIONS THUNDERBIRD WILL CRASH ON GENERATING THE ERROR THAT THEY HAVE BEEN DISABLED, SIMPLY RELAUNCH AND ALL WILL BE FINE!  
(Version 0.7a)

BOB WEINER  There is still no means of documentation or automation to migrate from a previous version of Thunderbird over to the newest version. I've checked the website, and have not been able to locate directions on what the procedure is to move from 0.6 to 0.7c. I've noticed that Thunderbird 0.7c places all Profiles information under ~/Library/Thunderbird whereas the previous version stored it in /Library/Thunderbird. Simply copying over my previous profile information from the /Library/Thunderbird directory over to ~/Library/Thunderbird does not result in me being able to see any of my emails or address book. This is a serious issue and needs to be addressed before the 1.0 release.   
(Version 0.7a)

WZRDJR  It's fast and very pleasing to the eye. Unfortunately, the lack of Mac Address Book support is a deal-breaker. I'll switch if that ever materializes. Also, there is no ability to import messages and/or the folder structure from another mail app. While you're at it, Entourage 2004 has the ability sort by relative dates (i.e. "today", "yesterday", "2 weeks ago", etc.) and perhaps that could be thrown in.  
(Version 0.6)

MURILø CINZENTø  This one work better than the others versions,and when i do the "delete"the Thunderbird REALLY do the thing.Congrataulations people1  
(Version 0.6)

THOMAS  This is getting better and better. The interface updates make a HUGE difference too. Should i switch from mail.app? Not sure yet. But maybe.  
(Version 0.6)

ANONYMOUS  Seriously thinking about switching to this (from Mail.app) The things I like most are the increased speed and greater configurability. The only things that would potentially keep me using Mail.app are lack of AddressBook integration, lack of services support and no way to run an external script from a filter. Also the toolbar configurisation sheet seems to be messed up in this release - it shows in a separate window but slides down like a sheet. Someone should do a Camino-job on this!!  
(Version 0.6)

BOB WEINER  A host of improvements -- namely the addition of the 'Mark Junk' button on the toolbar (which was sorely lacking in previous releases) and a 'Mark' button which actually works. The interface looks a lot cleaner, too. Overall, I'm impressed. :)  
(Version 0.6)

BRADY J FREY  Not only the absence of the address book feature, but still doesn't want to import my files from the .mail app (which I've been using to avoid MS and purchasing new software). Give me that integration and I'd swing it company wide.  
(Version 0.6)

ANONYMOUS  An excellent mail application. Works well, stable. My only complaints are:

- would like OS X Address Book integration

- a bit of a memory hog compared to Gyazmail  
(Version 0.5)

WUDDEL  One thing that is really great about TB: If you are using IMAP and your service provider has set up some unchangeable folder (which are used by the webmail-part) you can tell TB to use them for specific purposes. Great for non-english providers. For example you can use "Entwürfe" (german for drafts) as your drafts folder.

You can set a new trash folder too, but you have to edit the prefs.js file. There is no GUI-solution for this yet.

Features: 3 - Addressbook intergration or better in-TB addressbook needed + more possible settings please. Rest 5 stars!

I use a nightly (post-0.5) which is very stable and already has the great pinstripe theme.  
(Version 0.5)

ALBRIGHT  Hey, look, it's a usable Usenet client in OS X! I was expecting it to have some of Firefox's clunkiness, but it's gratefully missing for most operations. However, like Firefox, it doesn't support OS X's standard spell-checking features.   
(Version 0.5)

ANONYMOUS  A big absence is the integration with the Apple Address Book  
(Version 0.5)

JOEL NELSON  Want to set default fonts/formatting for outgoing email (like in Mozilla 1.6)? This isn't in Thunderbird by default, but if you go to http://mcf.mozdev.org/ and install the MCF extension, you can reenable the default formatting feature.

"Insider" note: Thunderbird 0.6 is supposed to have a redesigned interface for OS X that will probably match the new Pinstripe theme in the Firebird nightlies.  
(Version 0.4)

JOEL NELSON  For those looking to sync Thunderbird with a Palm:

http://ftp.mozilla.org/pub/mozilla.org/thunderbird/extensions/palmsync/

Note: I haven't tested this myself, but it looks like it should work.  
(Version 0.4)

ANONYMOUS  Out of the three e-mail clients I have on my computer (the other two being Mail and Entourage), Thunderbird was the easiest and quickest to set up. Unlike Entourage, it didn't ask me personal questions that have nothing to do with sending and receiving e-mail. Once I got into it, I could pull up mail and do a number of other things without having to wade through menus to find them. Thunderbird doesn't have as many features as, say, Mail, but I can add more as they come out and, importantly, choose only the ones I actually want. Thunderbird was also able to read a few e-mail messages that showed up blank in Mail. The only things I don't like is a lack of integration with Address, no junk mail filter (though that will probably change soon), and a general lack of Aqua themes (Smoke and a few others look nice in OS X, though).  
(Version 0.4)

JOEL NELSON  I have set Thunderbird as my default email program. Both Mozilla and Mozilla Thunderbird are great programs (the mail client is much more advanced than Mail.app and does feature junk filtering) but I like Thunderbird a little better, mainly because it is smaller and has a very clean interface. It will be getting a more OS X-style UI in the near future.  
(Version 0.4)

GREG  This application rocks on OS 10.3.3. I've not had a single problem with it; it installs quickly, and does everything I need it to do as my e-mail client (which isn't much, but still...).

It looks better than Mail.app, isn't as intrusive as that M$ piece of crap, and is very robust in its own right. Also, it plays very well with Firebird.

Granted, I don't have many mail requirements. I basically just use it to send and reply to simple HTML or text messages with the occasional attachment. And, if a junk mail filter is added within the next couple of releases, this application will be perfect!  
(Version 0.4)

ANONYMOUS  Be prepared for a mac-ish UI sooner or later ;)  
(Version 0.4)

ANONYMOUS  I've been following the porgress closely for a while and it's getting better and better with each release. The only things keeping me from switching are Mac OS X Address Book support as well as Keychain support.  
(Version 0.4)

SIR LOIN OF BEEF  To quote the release:

"The Windows animated alert has a new look and feel"

"Windows: Thunderbird can be set as the default mail client"

"Windows users can copy and paste images"

"Requirements:

Mac OS X 10.1 or later."

Bummer for all those Windows users who don't have OS X 10.1 or later.

Anyway, how is this app better than the "other" freebie, Mail.app? Why bother? The whole, extended mozilla project is, unfortunatly, becoming as relevant as the T-Rex in their icon.  
(Version 0.4)

MOZILLA FAN  odd... there's been many updates since .3 with tonnes of bug fixes and they haven't even updated thunderbird for ages, the only problem i have is that it doesn't have as good junk detection as mail.app  
(Version 0.3)

U R A LOOZER  "...you really should not wish for things to work well for free software."

wow. how hard did you have to work to make such an ignorant blanket statement?

on yer bike, chump.  
(Version 0.3)

ANONYMOUS  Forget about trying to apply the modern theme. It's not supported yet. Get yourself a real email client like PowerMail or Eudora and call it a day. Otherwise, you really should not wish for things to work well for free software.  
(Version 0.3)

ANONYMOUS  Does anyone know how to get the Modern theme icons to install? I hoped they would do so with this newest version, but they still do not, and I am still unable to manually customize. Believe me, I'm happy to have found Thunderbird, but the Modern theme would clinch the deal in regard to aesthetics. Advice, please.  
(Version 0.3rc2)

AL  If I didn't like this program, I wouldn't have updated to the newest version. It is being downloaded as I type. I have been a mail.app user, but I like the feel of T-bird. There is something about how it responds, and I love the way it handles addresses in the sidebar.   
(Version 0.3rc2)

BLW  This is the only email program that I've gotten to work with SpamCop! Entourage, Outlook Express, and Apple's Mail programs wrap the all-important header information, which SpamCop won't process. Thunderbird did it correctly the first time.

Setting fonts is a pain, but possible with tinkering. I can't deselect the automatic get-mail function when booting the program ...unless more tinkering is needed. Can't find an option to set colors for read and unread mail in the inbox. Maybe the option is there somewhere.

Still, this may just become my email program instead of the others mentioned above. I'm getting to like it more and more. Simplicity and a clean look. Forwards text without chopping up line lengths.  
(Version 0.2)

ANONYMOUS  I manage computers for a large company that uses mac, linux and windows. Thunderbird is the first email client that works seamlessly accross all platforms. Which is nice for training.

- It has powerful filtering and spam/junk mail features

Additionally it affords much more protection from viruses then Outlook and happens to do it for free!

I use the mac os x version but it works the same on windows and linux.  
(Version 0.2)

3818  Well, this is the best release of T.B. yet. However, there is one minor bug: if you are using Firebird as you default browser, TB will not link properly to F.B., and you may get an error messsage. Otherwise, T.B. works great with Safari, etc. Nice work! Kudos to the Moz.-T.B. development team. Avery nice alternative to Mail.app! If this is release 0.2, can you imagine what 1.0 will be like? Give it a try!  
(Version 0.2)

ANONYMOUS  I really like that I am able to check numerous email accounts on different mail servers. I have had no trouble creating and managing mail folders. In brief, I like the design of the client.

Yes, I too don't like it that I have to restart the programme when the window is closed.

I also would like it if the developer(s) could make the sound feature work!!!!! IT is so frustrating have a feature available, yet not working!!! IF it doesn't work, don't provide the option!!  
(Version 0.2)

THOMAS  still loose my window if i close it. then i have to restart the program or go through 3 steps to get it back. what a pain in the butt.  
(Version 0.2)

JERRY  like Thomas I cant open viewing window after I close it with out restarting the entire app. This

same thing happens with Mozilla Firebird, the browser. Must be a Mozilla thing. They need to that together. Also cant figure out how to create my own folders like in Mail. Otherwise I like it.  
(Version 0.1)

THOMAS  This is cool but when i close the main window i can't figure out how to open it again without quitting and restarting!! how annoying. However it looks promising. It's only 0.1.   
(Version 0.1)

ANONYMOUS  the first functional release; tried this several times before, but this one gives a first good look onto Thunderbird's features ... it's ok (dislike Apple Mail and don't trust MS Entourage ... so a good replacement candidate is anyhow worth looking at, for my personal point of view). Thunderbird is still a lil' to big and slow ... some gui-mismatches, too. but ok, it's v0.1  
(Version 0.1)

JZMAN  Works even better tham Mail. An awesome program.  
(Version 0.1)

JIMOHIO  I like this mail app better than Mail. It sports a pretty slick interface for a new application, and it works fine picking up five different email addresses that I have, including local ISP's, my .Mac account, etc. I'm impessed so far.........  
(Version 0.1)

ANONYMOUS  Already handles IMAP folders better than Mail.  
(Version 0.1)

ANONYMOUS  Easy to use, I like it as an alternative to Mail.  
(Version 2003-07-16)

ALFREDO  it works well, so far. I like the way it looks too.  
(Version 2003-07-16)

GOSTCODER  It's 11MB, enough said.  
(Version 2003-07-08)

ANONYMOUS  Useless right now but wait and see. Look at Mozilla, it was an awful bloated IE parody, now it is the best browser you can dream of, Unix / Windows / OS X.  
(Version 2003-06-25)

KRISBROWNE42  If I weren't on a real platform (OS X), and didn't have a real mail (mail.app) or real newsreader (Halime), This would be a good alternative to many available options. On OS X, if you're used to it from other platforms, it might be nice for consistancy. Solid, quick, not bad looking... But nothing compared to the native Cocoa alternatives.  
(Version 2003-06-25)

ANONYMOUS  It's still pretty buggy, but now it supports themes/extensions and fixed many bugs that it had previously, it now has a few more features than Mozilla Mail, but Thunderbird still isn't ready for mainstream use  
(Version 2003-06-18)

ANONYMOUS  There's nothing really outstanding in Thunderbird that would make you want to switch from Mail.app or Entourage. It lacks the advanced features that Mail.app and Entourage have, although its filtering system is pretty good. The interface is not very Mac-like. If you need a small, simple email client, get Thunderbird. If you need advanced features, stick with Mail.app or Entourage.  
(Version 2003-06-18)

JOHN  It's been almost 2 months now since the last Thunderbird (Minotaur) release was out for Mac, there hasn't been much stability enhancements. It does bear a new user interface, but it's not even near mac-ish. It lacks in many features over Mail.app and Entourage, but hopefully it will end up being a good alternative to Mail.app/Entourage. Currently you can only use Times/Courier/Helvetica for fonts on thunderbird, but hopefully you will be able to use any font later on. The customize toolbar feature doesnt seem to work in this build. Hopefully it will get better.  
(Version 0.1)