smf-spf (Sendmail SPF milter)

smf-spf is a lightweight, fast and reliable Sendmail milter that implements the Sender Policy Framework Anti SPAM technology with the help of the libSPF2 library. It checks SPF records to make sure that e-Mail messages are authorized by the domain name that it is coming from. It's an alternative for the spfmilter, spf-milter and milter-spiff milters. It's written in C.

  · external editable configuration file;
  · whitelist by an IP address (in CIDR notation);
  · whitelist by a PTR (reverse DNS) record;
  · whitelist by an envelope sender e-Mail address;
  · whitelist by an envelope recipient e-Mail address;
  · scalable and tunable fast in-memory cache engine;
  · SMTP AUTH support;
  · experimental RFC-4408 standard compliance;
  · standard Received-SPF: header builder;
  · option to blocking of e-Mail messages at SPF Fail results;
  · quarantine mode for e-Mail messages at SPF Fail/SoftFail results;
  · option to Subject tagging of e-Mail messages at SPF Fail/SoftFail results.

smf-spf v2.0.2 (Jan 10 2007)