Clustering mail servers - Cyrus or Courier ?
I'm looking for good solution for big, scalabale mailserver installation,
for 500,000 accounts and more...
As for now I think:
- sharng NFS-mounted mail storage is not so good idea.
- scaling can be done by partitioning mail storage between servers (with
a little less avialabilty risk).
However, AFAIK it can be done only with Cyrus with its IMAP Aggregator, or
with qmail-ldap + Courier-IMAP...
I started doing such installation with Courier-IMAP + qmail-ldap, and it's
nice, expect one thing - quota support. I need _reliable_ quota system..
Tis forced me to look at Cyrus, with its good quoa support, however, I
have no experience with Cyrus.
Would you give some advices ? Any comparision benchmarks ?