Documentation and information relating to my self-hosted mail server

Brief Architecture Overview

• Postfix is used as the SMTP server and Dovecot is used as the IMAP server

• TLS certs are obtained via lets encrypt

• OpenDKIM is used for signing paired with SpamAssassin for mail filtering

Features

• Appropriate DNS records (SPF, PTR, DKIM, DMARC) implemented for authentic, trusted and reliable mail. Full report available here

• DNSSEC enabled for Postfix allowing validated MX lookups, with DNSSEC additionally configured for the server's domain to protect the integrity of record resolution

• Strong encryption with AES-128-GCM and secure mail transmission with TLS 1.3

• Mail deliverable to the most prolific service proivders, such as Microsoft, Google and Yahoo

• Fully functional mail accounts accessible via IMAP/SMTP clients

• Mail accounts secured with a custom IPS script automatically dropping connections from IPs with suspicious activity

Extremely useful tools in debugging

• The `` postfix check ``` command

• The doveconf -n command

• https://www.appmaildev.com/en/dkim

• https://sendtestemail.com/

• https://mxtoolbox.com

Extremely useful documentation

• https://www.postfix.org/documentation.html

• https://doc.dovecot.org/

• https://thomas-leister.de/en/mailserver-migrate-config-to-dovecot-2.4-debian-trixie/

• https://landchad.net/mail/