On Wed, 2007-12-19 at 11:11 -0800, 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.  
> 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.

Dovecot has really come out in the past year or so.  I started with .99,
I upgraded from Courier, but honestly it wasn't really up to date.  

Dovecot's indexing showed an immediate improvement on large mailboxes.
With 1.0.5, the only issue I have is with a few older Mac clients.  For
me this affects about 4 out of 450 clients total.

I don't have any numbers, but I've had at least 1500 messages in my
INBOX, not including subfolders, with great performance.  The change was
so dramatic I didn't need any numbers.



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