✉️ Teaching an Old Dog New Tricks -- IRC: #neomutt on irc.libera.chat

C/C++ server and network library, including coroutine,redis client,http/https/websocket,mqtt, mysql/postgresql/sqlite client with C/C++ for Linux, Android, iOS, MacOS, Windows, etc..

The magma server daemon, is an encrypted email system with support for SMTP, POP, IMAP, HTTP and MOLTEN,. Additional support for DMTP and DMAP is currently in active development.

Dovecot mail server

Exim Mail Transport Agent - source, testsuite and documentation

The collaborative Open Source successor to qmail and netqmail

The comprehensive Arduino Email Client Library to send and read Email for Arduino devices. The library also supports other network shields or modules e.g., Wi-Fi, Ethernet, and GSM/4G modules.

SMTP client with sendmail compatible interface

SMTP Client Library in C

📬 YAM (short for 'Yet Another Mailer') is a MIME-compliant open-source Internet email client written for Amiga-based computer systems (AmigaOS4, AmigaOS3, MorphOS, AROS). It supports POP3, SMTP, TLSv1/SSLv3 connection security, multiple users, multiple identities, PGPv2/v5 encryption, unlimited hierarchical folders, an ARexx interface, etc...

A minimalist client for sending mail direct to recipient's MX

Fake SMTP server that prints emails to stdout

qmail fork with IPV6, TLS, DANE, DKIM, SRS2, SPF, daemontools, qmailanalog, mess822, & ucspi-tcp

Using openresty/nginx as a mail proxy. Changed some functions which openresty/nginx does is not as we expected. Using this project you can authentocate with initial servers, and send/recv emails. Support SSL for the upstream Servers.

Official libESMTP repository.

Email Encryption made Convenient and Reliable

A tool to verify electronic mail addresses using SMTP

qmail is a secure, reliable, efficient, simple message transfer agent.

Take a picture and Publish it via SMTP.

ECommun - A C based SMTP Protocol Implementation using Socket Programming