1. Jim Razmus II
  2. greyscanner


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Perl daemon that complements OpenBSD spamd(8) greylisting by applying additional heuristics to greylisted hosts.

Additional heuristics include:

  • confirm senders email address is valid
  • confirm existence of the senders MX or A record in DNS
  • confirm validity of recipient address(es)
  • and more

Offending hosts are flagged as 'trapped' in the spamd database.


20131205 - Version 1.02 released with a bug fix.

20090611 - Version 1.01 is available in the OpenBSD ports tree under mail/greyscanner.

Additional Documentation

Debugging instructions are available in the Developer Documentation.