• alpine
• alpine-nossl
• bogofilter
• clamsmtp
• dovecot
• dovecot-pigeonhole
• dovecot-utils

...

• emailrelay
• fdm
• greyfix
• mailman
• mailsend
• mailsend-nossl
• msmtp

...

• msmtp-mta
• msmtp-nossl
• msmtp-queue
• msmtpq-ng
• msmtpq-ng-mta
• msmtpq-ng-mta-smtpd
• mutt

...

• opendkim
• opendkim-tools
• postfix
• ssmtp