Packages providing mail-transport-agent
- courier-mta
- Courier Mail Server - ESMTP daemon
- exim4-daemon-heavy
- exim MTA (v4) daemon with extended features, including exiscan-acl
- exim4-daemon-light
- lightweight exim MTA (v4) daemon
- nullmailer
- simple relay-only mail transport agent
- postfix
- A high-performance mail transport agent
