Mail Server
These packages allow you to configure an IMAP or SMTP mail server.
- cyrus-sasl - The Cyrus SASL library
 - dovecot - Secure imap and pop3 server
 - sendmail - A widely used Mail Transport Agent (MTA)
 - sendmail-cf - The files needed to reconfigure Sendmail
 - spamassassin - Spam filter for email which can be invoked from mail delivery agents
 - spambayes - Bayesian anti-spam filter