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Tools Discussed

  • BSD OSes: FreeBSD, NetBSD, OpenBSD, BSD/OS, Darwin (Linux, Solaris, etc. should work too)
  • Sendmail (techniques also applicable to other MTAs)
  • DNS Blacklists
  • smtpd/smtpfwdd (from Juniper)
  • identd and fingerd (and replacements)
  • IPFilter
  • Sendmail "Milter" interface
  • Procmail
  • Open source "Filter kits" for spam and malware
  • Log monitors
  • "Anti-harvesting" techniques
  • Teergruben
  • Commercial/noncommercial virus checkers