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Universal Mailer is a Mail.app plugin that solves some issues when sending emails. It removes ATT00001.htm files, it correctly formats messages with attachments and inline images, and offers an option to set the default font for outgoing messages.

When enabled, Universal Mailer is able to correctly format outgoing emails, so that even after Exchange EWS filtering they retain the original format.

The plugin runs in the background without more...

What's New

Version 2.1.3: Release notes were unavailable when this listing was updated.


  • OS X 10.9 or later

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Universal Mailer User Discussion

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Dwimmerlaik Member IconReview+15

Universal Mailer does exactly what it says. If you look at the Developer's website, he offers suggestions for why it may not be working properly. The issues have nothing to do with the application, but rather with the crappy way that Apple Mail handles the outgoing font. The easiest way to solve any issues with it not working is to create a signature where you define the font, sizes, etc. or use an HTML signature using the the method described in a link on the site. It's a great app and I'm glad that the developer has continued to update it since Apple seems to have no interest in listening to the users who require the ability to define the outgoing font of their messages (as opposed to the font used to display the messages which is what the settings in Mail preferences actually do).

Reply0 replies
Version 2.1.3
flash1296gmailcom8977 Member IconReview+14

This plug-in had the consequence of forcing MAIL 7.1 (1874)
under Mavericks to have all Mail operations slow to a crawl.

Reply1 reply
Version 2.1.3

NOTE: Disabling the plug-in and restarting Mail FAILED to solve the problem; but deleting same SOLVED the software problems

Lemerlot Member IconComment+121

Seems to interfere with Attachment Tamer Mail plug-in, which is a plug-in-must for me.

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Version 2.1.2
Sgt_Bilko Member IconComment+49

This is a question rather than a review because I haven't used this plugin yet. Under Mountain Lion if I sent a jpeg attachment to a Windows user and particularly to somebody with Outlook the images seemed to be embedded and couldn't be saved properly by the recipient, however I tested this a couple days ago under Mavericks and the problem was resolved. I therefore wanted to know why we might need this plugin?

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Version 2.0.1
webweasel Member IconReview+0

Great plug-in which is invaluable whilst using Mail in a commercial environment.

However please note that the current version on MU is out of date and won't work beyond OS 10.6.

The current version of the plug-in is 1.5.2 and is now open source (ie free). Please visit the developer's site or github for details.

Reply1 reply
Version 1.4

> won't work beyond OS 10.6

Don't know where I got that from. Anyway, 1.4 doesn't seem to work beyond Mail 6.2 which is why I came by...

scophi Member IconReview+0

Still doesn't work...Mac 10.8.2 and Mail 6.2

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Version 1.4
Dan-Neal Member IconReview+8

this has apparently broken with 10.7.3 and Mail 5.2.

The link to the developer site is broken so I guess we'll just have to wait for a fix.

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Version 1.2.9
vltava Member IconReview-1

It does exactly what it says and solved my issues with Mail.app.

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Version 1.2.8
There are no Ratings for this App yet.
> 3 6


Current Version (2.x)


Downloads 7,941
Version Downloads 1,136
Type Utilities / System
License Free
Date 07 Jan 2014
Platform Intel 64 / OS X
Price Free
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