From: Mark Wooding <mdw@distorted.org.uk>
Date: Wed, 19 Jul 2017 09:46:08 +0000 (+0100)
Subject: lists.m4, exchange.m4: Check for bogus addresses when doing DNS lookups.
X-Git-Url: https://git.distorted.org.uk/~mdw/exim-config/commitdiff_plain/b96f02cfaef5a7eef4f6decc651955405e2fe099?hp=b96f02cfaef5a7eef4f6decc651955405e2fe099

lists.m4, exchange.m4: Check for bogus addresses when doing DNS lookups.

Inspired by Chris Siebenmann's `How not to set up your DNS' series; see
https://utcc.utoronto.ca/~cks/space/blog/__Index.
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