courier
- Ebuilds: 3, Stable: 1.4.1, Testing: 1.6.0, 1.4.1 Description:
Complete email package consisting of pop, imap, smtp, and fax
server and secure version of the above also.
Homepage:https://www.courier-mta.org/ License: GPL-3
esmtp
- Ebuilds: 1, Stable: 1.2-r2 Description: User configurable relay-only Mail Transfer Agent with a sendmail-like syntax
Homepage:http://esmtp.sourceforge.net/ License: GPL-2
exim
- Ebuilds: 2, Stable: 4.98.2-r1, Testing: 4.98.2-r2 Description:
Exim is a message transfer agent (MTA) developed at the University of
Cambridge for use on Unix systems connected to the Internet. It is
freely available under the terms of the GNU General Public Licence. In
style it is similar to Smail 3, but its facilities are more general.
There is a great deal of flexibility in the way mail can be routed, and
there are extensive facilities for checking incoming mail. Exim can be
installed in place of sendmail, although the configuration of exim is
quite different to that of sendmail.
Homepage:https://www.exim.org/ License: GPL-2
msmtp
- Ebuilds: 3, Stable: 1.8.30, Testing: 1.8.32 Description: An SMTP client and SMTP plugin for mail user agents such as Mutt
Homepage:https://marlam.de/msmtp/ License: GPL-3+
opensmtpd
- Ebuilds: 4, Stable: 7.7.0_p0, Testing: 7.8.0_p1 Description:
OpenSMTPD is an implementation of the server-side SMTP protocol as defined by RFC 5321, with some additional standard extensions. It allows ordinary machines to exchange e-mails with other systems speaking the SMTP protocol.
Homepage:https://www.opensmtpd.org License: ISC BSD BSD-1 BSD-2 BSD-4
postfix
- Ebuilds: 3, Stable: 3.10.8, Testing: 3.12_pre20260316 Description: A fast and secure drop-in replacement for sendmail
Homepage:https://www.postfix.org/ License: || ( IBM EPL-2.0 )
proton-mail-bridge
- Ebuilds: 1, Testing: 3.21.2 Description:
Proton Mail Bridge has been open-source since April 2020.
It functions as a daemon that serves as an interface between Proton
Mail's encrypted email services and standard IMAP/SMTP email clients.
This allows users to integrate Proton Mail with applications like
Thunderbird, Outlook, and Apple Mail.
The Bridge can be compiled with or without its Qt-based graphical
user interface (GUI), offering flexibility for both desktop and
headless environments.
Homepage:https://proton.me/mail/bridge https://github.com/ProtonMail/proton-bridge/ License: GPL-3+ Apache-2.0 BSD BSD-2 ISC LGPL-3+ MIT MPL-2.0 Unlicense
sendmail
- Ebuilds: 8, Stable: 8.18.2, Testing: 8.19.0.0 Description: Widely-used Mail Transport Agent (MTA)
Homepage:https://www.sendmail.org/ License: Sendmail GPL-2
ssmtp
- Ebuilds: 2, Stable: 2.64_p12, Testing: 2.64_p12 Description: Extremely simple MTA to get mail off the system to a Mailhub
Homepage:https://wiki.debian.org/sSMTP License: GPL-2