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DESIGN.md 594B

Design Description for Mailserver Role

Mail filters

Four mail filters are used:

  • Postgrey, which runes on port 10023 and is hooked into postfix with the smtpd_recipient_restrictions variable;
  • OpenDKIM, which runs on port 8891;
  • OpenDMARC, which runs on port 54321; and
  • Rspamd, which runs on port 11332.

OpenDKIM, OpenDMARC, and Rspamd are all hooked into postfix with the smtpd_milters variable. All of this can be found in etc_postfix_main.cf.