modern, secure, all-in-one mail server.

For sending and receiving email. With support for IMAP4, SMTP, SPF, DKIM, DMARC, MTA-STS, DANE and DNSSEC, reputation-based and content-based junk filtering, Internationalization (IDNA), automatic TLS with ACME and Let's Encrypt, account autoconfiguration, webmail.

• Mox @ GitHub.

Welcome to the "Learn and Test DMARC" console! Here, you'll get a visual breakdown of how email servers communicate, giving you a better understanding of SPF, DKIM, and DMARC and how they work together.

Related contents:

• LearnDMARC - Testez et comprenez la sécurité de votre serveur mail en 2 minutes @ Korben :fr:.

Open source DMARC report analyzer and visualizer

• parsedmarc @ GitHub.
• parsedmarc-dockerized @ GitHub.
• dmarc-visualizer @ GitHub.
• Analyze and visualize DMARC results using open source tools @ debricked blog.
• Set Up ParseDMARC on Ubuntu 20.04 to Analyze DMARC Reports @ LinuxBabe.

A curated list of resources on Email tools, server, framework, technology...

• 266 - EMail - Pierre-Yves Dubreucq @ <ifttd> :fr:.

Check DMARC, DKIM, and SPF Settings

Newsletters spam test. Test the Spammyness of your Emails.

DMARC, SPF, DKIM, BIMI checker.

Instantly test your domain to verify your DMARC, SPF, DKIM, BIMI configurations The Merox solution helps you implement DMARC and many other DNS security protocols and standards.

rotation and revocation of DKIM keys.

dkim-rotate is a tool for managing DKIM (email antispam) keys in a manner that avoids unnecessarily making emails nonrepudiable.

Broadly, dkim-rotate intends to weaken the non-deniable authenticity of leaked and archived emails, while still retaining DKIM’s antispam function. For more discussion of the problem, and the chosen solution, see dkim-rotate(7), and Matthew Green’s article Ok Google: please publish your DKIM secret keys.

DKIM rotate @ Debian Salsa.