We configured sendmail + dovecot + MailScanner + clamav + horde The configuration is P4 2GIG / 1 GB RAM / scsi hdd 72 GB serving @ 200 users online. Squirrelmail use less processing power and memory. Nilesh -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subjecthttps://www.redhat.com/mailman/listinfo/redhat-list