Does anyone allow unlimited or extremely large quotas?

Adam Tauno Williams awilliam at
Tue Nov 16 10:46:57 EST 2010

> > We find that Webmail chokes server performance much earlier than normal
> > IMAP clients do. I know this has nothing to do with Cyrus, but I just
> > thought I'd mention it. Most programming environments in which such
> > Webmail thingies are written (mostly PHP on the server and nowadays
> > lots of Javascript on the browser) cannot keep an IMAP connection to the
> > Cyrus server open between pages, therefore each time a user clicks on a
> > folder or does any other operation, there's this fresh IMAP connection
> > and a huge surge of IMAP operations while the folder contents are listed
> > afresh, etc. This puts a lot of load on the server. I guess Webmail is
> > OT on a Cyrus mailing list, but can't help asking: any suggestions for
> > improving Webmail performance? (Admission: we haven't yet tried imapproxy
> > -- it appears to be a good piece of C which will help things.)
> We use imapproxy here to avoid exactly this situation with webmail.


We use up.imapproxy; since installing that our Horde/IMP servers *fly*.
The performance difference is really impressive.

Adam Tauno Williams <awilliam at> LPIC-1, Novell CLA
OpenGroupware, Cyrus IMAPd, Postfix, OpenLDAP, Samba

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