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Re: Strict RFC x821 Compliant: MAIL FROM:

2005-07-06 03:26:46

On Wed, 6 Jul 2005, Matti Aarnio wrote:

Requiring angle brackets in MAIL and RCPT addresses works usually,
but then some odd junk (Windows CE 1.0/2.0 at least) coders hadn't
cared to read the syntax thru properly, and "as long as it works
with sendmail 5.x, it is good" ..  (or some such)

Rejecting messages because "MAIL FROM:" is followed by a space
would reject apparently lots of Outlooks, which form some 60%
of our customers email clients (when counting their x-mailer: headers)
Counting on protocol trace logs...  the rejection would be about
60-70% of all MAIL FROMs in today morning traffic.

This is useful operational information for smarthost and submission server
implementors, but it is irrelevant for MXs because none of this software
routes email according to RFC 974.

Tony.
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