Servers: 2 SuperMicro single-Xeon (dual-capable) 2.8, 1gb RAM, mirrored SATA boot
Storage: 1 SuperMicro dual-Xeon 2.8, 2gb RAM, 600GB RAID5 SATA shared via NFS over GigE
- OS: RHEL 4
Users: 10,000 mostly POP users, SquirrelMail IMAP
- Auth: MySQL
- Maildir size: daily averages about 50gb
- Dovecot version: 1.0 beta 5
- Client Software: squirrelmail, outlook, outlook express, thunderbird, eudora, Apple Mail, Claris Emailer, and other odd clients too numerous to mention
This system is intentionally over-engineered, to replace the single server Courier-IMAP system that it replaced. Load on each Dovecot/SquirrelMail server is very low and allows for a lot of growth.
Our incoming MTA is Exim, on another pair of SuperMicro machines writing to the same NFS over GigE.