Viktor Dukhovni wrote on 2019-11-18 12:56:> ...
At the end of the day, operating outside the RFC carries some risk,
and one should not be cavalier in deploying creative deviations from
the spec. However, post-MX CNAME indirection is seen to useful by
some to stick to the spec, and since MTAs tolerate this, it is used
in the wild.
a lot of things happen in the wild. that's why we call it "the wild".
every protocol recommendation should be thought of as rebuilding the
airplane during flight -- to be done with utmost caution. "just do
whatever mostly works" is in no way cautious.
--
P Vixie
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