Packages with the mta use flag

mail-mta / msmtp : An SMTP client and SMTP plugin for mail user agents such as Mutt

  • Enable this to install as system-wide MTA

mail-mta / opensmtpd : Lightweight but featured SMTP daemon from OpenBSD

  • Enable this to install as system-wide MTA

mail-mta / ssmtp : Extremely simple MTA to get mail off the system to a Mailhub

  • Install symlinks for sendmail-compatible MTA.

sys-process / fcron : A command scheduler with extended capabilities over cron and anacron

  • Enable mta support for sending emails from fcron