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There are a lot of mail servers out there. Microsoft Exchange has been the dominant corporate mail server in the enterprise on Windows, but I've been using Kerio Mailserver for a long time now and am still wondering if there aren't any better solutions.

Which mail-server do you use, and why?
What feature make a specific mail-server 'stand out'?

Both *NIX and Windows applications are welcome.

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36 Answers 36

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Postfix+postfixadmin+dovecot and rouncube webmail (w/postfixadmin plugin), all using a MySQL backend.

Simply because it's free and rock stable.

Probably going to move to Exchange when I have the budget for it. I want to synchronize my calendar from my smartphone (our sales team -really- wants it).

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I like Unison as it integrates all my communications tools in one application-very simple as you access email/im and telephone rules from one simple interface... It manager doesn't have anymore multitude of servers to manage as well telephony becomes integrated with the rest of tech tools

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if you read about sendmail at all you quickly discover its history of "bug of the week". Other solutions have come out since then, in fact a lot.

Postfix makes a good drop in replacment.

Qmail touts its correctness and security.

I know more about SELinux than qmail so I take my chances with having the correct SELinux policy (ie custom SELinux policy, though the default should be fine, properly configured of course) with a drop in sendmail replacement.

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  • sendmail may have had a history of "bug a week" but by all accounts modern sendmail is far more secure than it once was.
    – Cian
    Jul 12, 2009 at 0:41
  • This is true, and I even will put my chips in with modern sendmail. However there is the on going problem that software is never perfect so to this day we are still dealing with stack overflows and similar problems. It seems there are two approaches to dealing with security and I believe both are correct and for an example I like to use OpenBSD and SELinux as the examples. OpenBSD attacks security from the angle of having the software engineered correctly, where SELinux assumes that software will fail (assuming it of course won't fail). I think both should be followed to a degree.
    – rev
    Jul 14, 2009 at 17:11
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For a Windows shop, Ipswitch's IMail packs quite a punch for the money.

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I used Qmail for years - mostly because I spent a lot of time maintaining a medium-sized Qmail installation for one of my employers a few years ago.

I recently moved all my email from Qmail to Exim, and managed to (mostly) script the migration of all the virtual domains. I also moved from using Courier to Dovecot for IMAP and POP3.

http://struction.de/projects/HOWTO_VirtualMail_Exim-MySQL-Spamassassin-ClamAV-Dovecot/index?set_style=clean is a good guide on combining Exim with ClamAV, Spamassassin, Dovecot with a MySQL backend.

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Groupwise. Because it gives users something to complain about. That's the only reason I can think of for using it.

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  • I want to upvote this, but my personal EULA stops me... ^^ May 1, 2009 at 21:35
  • ..that's ok, i have to turn in my reputation points in each year to Novell..
    – SqlACID
    May 1, 2009 at 23:43
  • It's also the only major 'brand' server with a completely cross-platform client (looks/works the same in Linux, Mac, and Windows). It's now run on OES, which is basically SuSE Linux and the server post office is rock solid. It's gone from 'stupid' to 'odd, but rather nice after the extreme pain induced by Exchange.' Jun 5, 2009 at 18:48
  • Haha, hilarious. +1
    – pauska
    Jun 17, 2009 at 0:20
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