Tom Collins wrote:
> Courier-IMAP seems to be putting a heavy load on my server when someone
> accesses a mailbox with a large number of messages in it.  I recently
> scanned the mailboxes on my server, and sent some notices out to clients
> who had boxes with old, unread messages in them.  I think that today
> some have gone online to pick up that mail, and I'm suffering the
> consequences (server load of 14.0+).
> 
> What's the preferred IMAP server for a machine that will have 100-200
> connections (plan for growth...) but may have an occasional mailbox with
> 1000+ messages in it.  I've searched the archives and tried to google
> for "imap server performance" and "imap server comparison" but haven't
> come up with much after an hour.
> 
> My impression is that Dovecot performs well, better than courier, but
> I'm wondering if anyone can offer up some real-world numbers to help me
> make my decision.
> 

We suffered the same problem and came to the same conclusion. Courier
had to go. We installed Binc two years ago and have been very happy so
far. I doesn't even use enough resources to know it is there, I honestly
forget about it.

We looked at Dovecot and may again, but we choose Binc because we needed
maildir++ quota support (which Dovecot now supports).

DAve


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