| courier |
An MTA designed specifically for maildirs |
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| esmtp |
User configurable relay-only Mail Transfer Agent with a sendmail-like syntax |
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| exim |
A highly configurable, drop-in replacement for sendmail |
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| msmtp |
An SMTP client and SMTP plugin for mail user agents such as Mutt |
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| netqmail |
qmail -- a secure, reliable, efficient, simple message transfer agent |
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| notqmail |
Collaborative open-source successor to qmail |
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| nullmailer |
Simple relay-only local mail transport agent |
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| opensmtpd |
Lightweight but featured SMTP daemon from OpenBSD |
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| postfix |
A fast and secure drop-in replacement for sendmail |
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| proton-mail-bridge |
Serves ProtonMail to IMAP/SMTP clients |
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| qpsmtpd |
qpsmtpd is a flexible smtpd daemon written in Perl |
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| sendmail |
Widely-used Mail Transport Agent (MTA) |
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| ssmtp |
Extremely simple MTA to get mail off the system to a Mailhub |
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Packages