[Dovecot] any limitations running on a Mac?

Terry Barnum terry at dop.com
Fri Feb 26 00:17:35 EET 2010

I have postfix/dovecot/mysql installed using MacPorts on a quad-core 2.8GHz MacPro running Snow Leopard (10.6.2). I moved the base mail directory to a pair of 10k RPM Raptors that are mirrored (/Volumes/email/) and everything seems to be working fine on an unused domain with very little traffic. I used imapsync to pull everything from the current mailserver to this test server to play with.

Our current mailserver's IMAP performance *really* suffers when an IMAP folder exceeds ~500MB or ~5k messages. I've become very tired of being the mailbox police trying to get my 20 users to delete email or divide into smaller mailboxes.

Are there folks on the list running postfix/dovecot on similar Mac hardware that can share their experiences? Specifically, are there any limitations (file descriptors, other?) that can impact performance I should be aware of? How does dovecot on the Mac deal with >500GB maildirs?

Is there a recommended tool for loading and testing the server? Postal?

I have 20 IMAP users, with a total of ~37GB of mail currently.

Thanks for any help and insight.


Terry Barnum
digital OutPost
San Diego, CA


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