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As SPF is almost well known anti-spam feature honored by many sites, please include libspf package to the Fedora-Extras and rebuild milter-greylist package with SPF support. Working packages for RHEL3 and RHEL4 are in my repository, see: ftp://ftp.pslib.cz/pub/users/Milan.Kerslager/RHEL-3/testing.milter-greylist/ ftp://ftp.pslib.cz/pub/users/Milan.Kerslager/RHEL-4/testing.milter-greylist/ They will be moved to the stable directory soon: ftp://ftp.pslib.cz/pub/users/Milan.Kerslager/RHEL-{3,4}/stable See URL above for libspf homepage.
I tried libspf and found out that it has a bad code quality. It contains code like | if (rr_data == NULL) | { | rr_data = xmalloc(substr_len + 2); | } | else | { | rr_data = xrealloc(rr_data, (i + substr_len + 2)); | } | strncat(rr_data, (char *)rd_ptr, substr_len); at several places and that is really nothing which should touch my or somebody else's mails. There were memleaks also, but I can not remember the details and can not find the libspf forum anymore where I posted my bugreports. So I will not fix that, unless: * somebody else packages libspf and proofs that he fixed all issues * somebody else packages an alternative spf implementation
This seems to be a good reason to not to use SPF. Thank you for pointing out. The second reason is that a lot of spam went through milter here because spamming relays are using MailFrom from random domains with globally enabled SPF records. So the spams are going through milter-graylist with no problem...