- [Dovecot](https://www.dovecot.org/) - IMAP and POP3 server written primarily with security in mind. ([Source Code](https://github.com/dovecot/core)) `MIT/LGPL-2.1``C/deb`
- [Stalwart JMAP](https://stalw.art/jmap) - JMAP and IMAP server designed to be secure, fast, robust and scalable. ([Source Code](https://github.com/stalwartlabs/jmap-server)) `AGPL-3.0``Rust/Docker`
- [Stalwart JMAP](https://stalw.art/docs/jmap/overview) - JMAP and IMAP server designed to be secure, fast, robust and scalable. ([Source Code](https://github.com/stalwartlabs/jmap-server)) `AGPL-3.0``Rust/Docker`
### Communication - Email - Mail Transfer Agents
@ -419,7 +419,7 @@ Simple deployment of [E-mail](https://en.wikipedia.org/wiki/Email) servers, e.g.
- [Postfix](http://www.postfix.org/) - Fast, easy to administer, and secure Sendmail replacement. `IPL-1.0``C/deb`
- [Sendmail](https://www.proofpoint.com/us/products/email-protection/open-source-email-solution) - Message transfer agent (MTA). `Sendmail``C/deb`
- [Slimta](https://slimta.github.io/) - Mail Transfer Library built on Python. ([Source Code](https://github.com/slimta/python-slimta)) `MIT``Python`
- [Stalwart SMTP](https://stalw.art/smtp) - Modern SMTP server designed with a focus on security, speed, and extensive configurability. ([Source Code](https://github.com/stalwartlabs/smtp-server)) `AGPL-3.0``Rust`
- [Stalwart SMTP](https://stalw.art/docs/smtp/overview) - Modern SMTP server designed with a focus on security, speed, and extensive configurability. ([Source Code](https://github.com/stalwartlabs/smtp-server)) `AGPL-3.0``Rust`
### Communication - Email - Mailing Lists and Newsletters