mail-mta/esmtp A user configurable relay-only MTA with a sendmail compatible syntax
mail-mta/exim A highly configurable, drop-in replacement for sendmail
mail-mta/msmtp msmtp is an smtp client
mail-mta/nbsmtp Extremely simple MTA to get mail off the system to a relayhost
mail-mta/opensmtpd Portable version of smtp server implementation for OpenBSD
mail-mta/postfix Fast, easy to administer and secure mail transport agent
mail-mta/sendmail Widely-used Mail Transfer Agent (MTA)
mail-mta/ssmtp ssmtp is a send-only sendmail emulator for machines which normally pick their mail up from a centralized mailhub


arbor Base system (core)
alip Ali Polatel's dev repo (dev)
compnerd compnerd's dev repo (dev)
kdecherf Kdecherf's personal repository (third-party)
mawww mawww's supplemental repository (third-party)
nakamuray nakamuray's package repository (third-party)