Sysop:OpenBSD smtpd

• man pages
  • smtpd: http://www.openbsd.org/cgi-bin/man.cgi?query=smtpd
  • smtpd.conf: http://www.openbsd.org/cgi-bin/man.cgi?query=smtpd.conf
• Some Guides:
  • defcon.no: http://wiki.defcon.no/doku.php?id=guides:opensmtpd
  • calomel: https://calomel.org/opensmtpd.html