Server: Celeron - 2.66GHZ 512MB RAM 80GB HD
OS: CentOS 4.2
Users: 250
Total /var/spool/mail Size: 7 Gb
Dovecot version: 1.0.13
Protocols: pop3
Client Software: Thunderbird, Outlook Express, Outlook, Usermin
I had some mbox problems, so I compiled 1.0.13. The latest version available with yum for Centos 4.2 is 0.99.18.