ssmtp

extremely simple MTA to get mail off the system to a mail hub

A secure, effective and simple way of getting mail off a system to your mail hub. It contains no suid-binaries or other dangerous things - no mail spool to poke around in, and no daemons running in the background. Mail is simply forwarded to the configured mailhost. Extremely easy configuration. WARNING: the above is all it does; it does not receive mail, expand aliases or manage a queue. That belongs on a mail hub with a system administrator.

postfix

High-performance mail transport agent

Postfix is Wietse Venema's mail transport agent that started life as an alternative to the widely-used Sendmail program. Postfix attempts to be fast, easy to administer, and secure, while at the same time being sendmail compatible enough to not upset existing users. Thus, the outside has a sendmail-ish flavor, but the inside is completely different.

nullmailer

simple relay-only mail transport agent

Nullmailer is a replacement MTA for hosts, which relay to a fixed set of smart relays. It is designed to be simple to configure and especially useful on slave machines and in chroots.

esmtp-run

user configurable relay-only MTA - the regular MTA

ESMTP is a user configurable relay-only Mail Transfer Agent (MTA) with a sendmail-compatible syntax. It's based on libESMTP supporting the AUTH (including the CRAM-MD5 and NTLM SASL mechanisms) and the StartTLS SMTP extensions. ESMTP does not receive mail, expand aliases or manage a queue but can deliver mail locally via an MDA. This package provides the regular MTA programs.

qmail-run

sets up qmail as mail-transfer-agent

This package sets up the Debian qmail package as mail-transfer-agent. It follows the most commonly used public documentation http://www.lifewithqmail.org/ almost completely. See /usr/share/doc/qmail-run/README.Debian for details.

sendmail-bin

powerful, efficient, and scalable Mail Transport Agent

Sendmail is an alternative Mail Transport Agent (MTA) for Debian. It is suitable for handling sophisticated mail configurations, although this means that its configuration can also be complex. Fortunately, simple things can be done easily, and complex things are possible, even if not easily understood ;) Sendmail is the *ONLY* MTA with a Turing complete language to control *ALL* aspects of delivery! Sendmail provides Security and SPAM/UCE/UBE protection via several means. Sendmail includes *no* Mail User Agents (MUA), you'll have to pick from the plethora of available MUAs (mutt, vm, etc.) This package supports REGEX, DB, NIS, NIS+, LDAP, DNS maps, and has enabled TCPWrappers, IPv6, LockFile, SMTP AUTH(SASL), STARTTLS(SSL).

exim4-daemon-light

lightweight Exim MTA (v4) daemon

Exim (v4) is a mail transport agent. This package contains the exim4 daemon with only basic features enabled. It works well with the standard setups that are provided by Debian and includes support for TLS encryption and the dlopen patch to allow dynamic loading of a local_scan function. The Debian exim4 packages have their own web page, http://wiki.debian.org/PkgExim4. There is also a Debian-specific FAQ list. Information about the way the Debian packages are configured can be found in /usr/share/doc/exim4-base/README.Debian.gz, which additionally contains information about the way the Debian binary packages are built. The very extensive upstream documentation is shipped in /usr/share/doc/exim4-base/spec.txt.gz. To repeat the debconf-driven configuration process in a standard setup, invoke dpkg-reconfigure exim4-config. There is a Debian-centered mailing list, [email protected]. Please ask Debian-specific questions there, and only write to the upstream exim-users mailing list if you are sure that your question is not Debian-specific. You can find the subscription web page on http://lists.alioth.debian.org/mailman/listinfo/pkg-exim4-users

exim4-daemon-heavy

Exim MTA (v4) daemon with extended features, including exiscan-acl

Exim (v4) is a mail transport agent. This package contains the exim4 daemon with extended features. In addition to the features already supported by exim4-daemon-light, exim4-daemon-heavy includes LDAP, sqlite, PostgreSQL and MySQL data lookups, SASL and SPA SMTP authentication, embedded Perl interpreter, and the content scanning extension (formerly known as "exiscan-acl") for integration of virus scanners and spamassassin. The Debian exim4 packages have their own web page, http://wiki.debian.org/PkgExim4. There is also a Debian-specific FAQ list. Information about the way the Debian packages are configured can be found in /usr/share/doc/exim4-base/README.Debian.gz, which additionally contains information about the way the Debian binary packages are built. The very extensive upstream documentation is shipped in /usr/share/doc/exim4-base/spec.txt.gz. To repeat the debconf-driven configuration process in a standard setup, invoke dpkg-reconfigure exim4-config. There is a Debian-centered mailing list, [email protected]. Please ask Debian-specific questions there, and only write to the upstream exim-users mailing list if you are sure that your question is not Debian-specific. You can find the subscription web page on http://lists.alioth.debian.org/mailman/listinfo/pkg-exim4-users

dma

lightweight mail transport agent

The DragonFly Mail Agent is a small Mail Transport Agent (MTA), designed for home and office use. It accepts mails from local Mail User Agents (MUA) and delivers them either to local mailboxes or remote SMTP servers. Remote delivery includes support for features such as TLS/SSL and SMTP authentication. dma is not intended as a replacement for full-featured MTAs like Sendmail, Postfix, or Exim. Consequently, dma does not listen on port 25 for incoming connections.

courier-mta

Courier mail server - ESMTP daemon

The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols, such as ESMTP, IMAP, POP3, LDAP, TLS, and HTTP. Courier provides ESMTP, IMAP, POP3, webmail, and mailing list services within a single, consistent, framework. This package provides an ESMTP daemon which uses the Maildir format as native storage format, supports IPv6, implements SMTP extensions for mailing list management and features integrated mail filtering. It can function as an intermediate mail relay, relaying mail between an internal LAN and the Internet, or perform final delivery to mailboxes. ESMTP over TLS is handled by the regular ESMTP daemon in conjunction with the TLS wrapper.

masqmail

mail transport agent for intermittently connected hosts

Masqmail is an MTA (mail transport agent) and POP3 client for hosts with no permanent network connection, such as home network servers or notebook computers. It has special support for connections to different Internet Service Providers. In these cases, Masqmail is a slim replacement for full-blown MTAs such as Sendmail, Exim, Qmail or Postfix. The POP3 client can be a small replacement for other full-featured tools like Fetchmail.

sendmail

powerful, efficient, and scalable Mail Transport Agent (metapackage)

Sendmail is an alternative Mail Transport Agent (MTA) for Debian. It is suitable for handling sophisticated mail configurations, although this means that its configuration can also be complex. Fortunately, simple things can be done easily, and complex things are possible, even if not easily understood ;) Sendmail is the *ONLY* MTA with a Turing complete language to control *ALL* aspects of delivery! Sendmail provides Security and SPAM/UCE/UBE protection via several means. Sendmail includes *no* Mail User Agents (MUA), you'll have to pick from the plethora of available MUAs (mutt, vm, etc.) This package supports REGEX, DB, NIS, NIS+, LDAP, DNS maps, and has enabled TCPWrappers, IPv6, LockFile, SMTP AUTH(SASL), STARTTLS(SSL). This package is to make installation/upgrading easier (Do NOT delete it)

opensmtpd

secure, reliable, lean, and easy-to configure SMTP server

The OpenSMTPD server seeks to be * as secure as possible, and uses privilege separation to mitigate possible security bugs * as reliable as possible: any accepted email must not be lost * lean: it covers typical usage cases instead of every obscure one * easy to configure, with a configuration syntax reminiscent of the OpenBSD Packet Filter's (PF) * fast and efficient: it can handle large queues with reasonable performance

exim

The exim mail transfer agent

esmtp

user configurable relay-only MTA

ESMTP is a user configurable relay-only Mail Transfer Agent (MTA) with a sendmail-compatible syntax. It's based on libESMTP supporting the AUTH (including the CRAM-MD5 and NTLM SASL mechanisms) and the StartTLS SMTP extensions. ESMTP does not receive mail, expand aliases or manage a queue but can deliver mail locally via an MDA. This package contains the esmtp program.

postfix-2

3.3.1-7.fc30.x86_64 : Postfix Mail Transport Agent