SpamAssassin
SpamAssassin
3.4.2

3.4

SpamAssassin free download for Mac

SpamAssassin

3.4.2
10 December 2018

Server side spam email blocker.

Overview

SpamAssassin is a mail filter which attempts to identify spam using a variety of mechanisms including text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases.

Using its rule base, it uses a wide range of heuristic tests on mail headers and body text to identify "spam", also known as unsolicited commercial email. Once identified, the mail can then be optionally tagged as spam for later filtering using the user's own mail user-agent application.

SpamAssassin typically differentiates successfully between spam and non-spam in between 95% and 100% of cases, depending on what kind of mail you get and your training of its Bayesian filter. Specifically, SpamAssassin has been shown to produce around 0.9% false negatives (spam that was missed) and around 0.1% false positives (ham incorrectly marked as spam). See the rules/STATISTICS*.txt files for more information.

What's new in SpamAssassin

Version 3.4.2:
  • sa-update now uses SHA-256 & SHA-512 hashing to verify rule updates
  • 4 new plugins
  • 4 CVE security bug fixes: CVE-2017-15705, CVE-2016-1238, CVE-2018-11780 & CVE-2018-11781

Join over 500,000 subscribers.

Subscribe for our newsletter with best Mac offers from MacUpdate.

10 SpamAssassin Reviews

Rate this app:

Jazzyguy
12 June 2007

Most helpful

This is NOT an application that can simply be placed in your applications folder and then launch it and configure it for your pop mail account in mail.app First you have to install the developer tools and then use Terminal to go through all kinds of permutations and commands. This app is for the users who know how to use Unix and are one of the brave and fearless. Unfortunately I am not one of them although I have dabbled with Fink and X11 I am depite all my years of experience with my Macs an ingenue and dilittente nevertheless. More power to those who can use this!
Like (5)
Version 3.2.1
Emale999
29 May 2016
Something seem wrong with this download: It only downloads the creepy "MacUpdate Installer". Where's the "deadlink"-Button?
Like
Version 3.3.2
Sanjinko
05 March 2012
SpamAssassin 3.3.2 has been released on 16 June 2011
Like
Version 3.3.1
Jazzyguy
12 June 2007
This is NOT an application that can simply be placed in your applications folder and then launch it and configure it for your pop mail account in mail.app First you have to install the developer tools and then use Terminal to go through all kinds of permutations and commands. This app is for the users who know how to use Unix and are one of the brave and fearless. Unfortunately I am not one of them although I have dabbled with Fink and X11 I am depite all my years of experience with my Macs an ingenue and dilittente nevertheless. More power to those who can use this!
Like (5)
Version 3.2.1
Foulger
02 May 2007
Great Product - worthy of a UB upgrade. Thanks to the developer for providing this essential tool free of charge.
Like
Version 3.2
Brian Kendig
29 April 2005
SpamAssassin is superb, especially when paired up with a mail server that makes good use of it. I have a Mac OS X 10.3.9 machine (not Server) on which I run the Exim mail server software, hooked up to SpamAssassin via SA-Exim. It's all free software. The mail server uses SpamAssassin to identify spam before it's accepted, so that it can refuse delivery. The result is that the spam never even appears in my junk mail folder; it's refused before it even gets to me.
Like
Version 3.0.3
Anonymous
21 December 2004
SpamAssassin is not magic. If your ISP/web hosting provider offers it and it isn't working well, they haven't set it up properly. I get hundreds to thousands of spam message per day on one account, and SpamAssassin is by far the best tool for filtering it out.
Like
Version 3.0.2
Anonymous
22 September 2004
SpamAssassin, when configured correctly, is an excellent package. I run it on my FreeBSD 4.9 server, as a module activated by MIMEDefang. SpamAssassin plays beautifully with Razor and MIMEDefang and returns perfect hits on all incoming spam. Incoming viruses are discarded before reaching the mailbox and spam tagging is triggered at 5.0 points. The combination is *so* effective, it has tagged 100% (Yes, 100%) of all spam in the last three weeks. And 0% of all legitimate email. Impressive. I am considering discarding all tagged email, so confident am I becoming in this combination. In any case, Apple Mail picks up the X-Spam-Score header and deals with junk mail appropriately.
Like
Version 3.0
Constantin
22 September 2004
SpamAssassin is a godesend. Here is an intelligent way to tag spam at the server level, then decide what to do with it. Using procmail or whatever, spam-tagged mail can be deleted, for example. More importantly however, is that spam can be stopped at the server level, i.e. before tying up your internet connection, computer, etc. (particularly if you're using a dialup connection). The new approach of blacklisting spam according what web-sites it is pointing to is brilliant, as it makes it that much harder for internet scum to succeed overcoming spam filters.
Like
Version 3.0
Anonymous
05 August 2004
pretty rubbish. spam assasin is installed on my webspace providers servers and seems to make no difference to the deluge of spam i receive daily [even when the subject lines and content are blatantly spam] - however it does seem to reject perfectly legitimate emails with annoying regularity
Like
Version 2.6.4
1 answer(s)
anonymous-heron-1577
anonymous-heron-1577
22 September 2004
SpamAssassin is a spam *tagger*. It's up to your e-mail client or (better) server-side filtering solution to take action based on its determination of whether a message is spam or not. I use it on my home network and it catches 90%+ of the spam that makes it past my Postfix IP and regex filters. Going from 30+ pieces of crap a day to one or two every few days is a godssend.
Like
Version 3.0
J-Mueller-MacUpdate
09 December 2003
SpamAssassin is great, even if you don't choose to automatically delete emails tagged as spam, because it can add a subject prefix to the incoming email like "{spam}". Then you can set a rule in your email client application to auto-move those to a specific folder for review. I only wish that SpamAssassin would be built to support client-side configuration based on a single domain so that shared hosting companies could more easily allow their clients to configure it.
Like
Version 2.6.1