spfmilter - SPF mail filter module
Spfmilter implements the Sender Policy Framework (http://spf.pobox.com/)
as a milter, using the libspf2 library.
The idea of SPF is to prevent email forgery. Each participating
domain sets up a little definition of which hosts are allowed to send
mail claiming to be from that domain. When another site receives
mail, it checks the permitted-senders definition for the originating
domain. If the check fails, the mail is rejected.
by Paul Howarth (2014-07-17):
- new upstream version 0.98
- changed the regular SMTP response code used in -graylist mode
from 451 to 421
- added pidfile option
- updated for clang, and general clean-up
- re-code manpage as UTF8