From: Mark Wooding <mdw@distorted.org.uk>
Date: Mon, 3 Feb 2014 15:35:04 +0000 (+0000)
Subject: base.m4: More subtle handling of HELO greetings.
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~mdw/git/exim-config/commitdiff_plain/fe8f2338460a4c038aec0b55a69b2421622159cc?hp=fe8f2338460a4c038aec0b55a69b2421622159cc

base.m4: More subtle handling of HELO greetings.

Rather than rejecting incorrect HELO greetings, we make two adjustments:

  * There's now an auxiliary list, `helo.conf', of manually provided
    exceptions, for well-known and basically honest hosts which are just
    misconfigured.

  * A failure to provide a correct HELO greeting now results in a
    BADHELO warning header rather than an immediate rejection.
    SpamAssassin has been configured to notice these headers and assign
    points for them, because they do seem to be a good indicator of
    spamminess.
---