[Mimedefang] Revisit: Filtering on HELO
gmurray at webwayone.co.uk
Sat Mar 17 05:07:27 EST 2007
"Kevin A. McGrail" <kmcgrail at pccc.com> writes:
> SHOULD means in RFC-speak that it should do what is said unless you
> understand the ramifications of not following the recommendation. In
> short, I see nothing in the RFC that could argue that sending just the
> hostname is proper. It's either the FQDN or the address literal.
And an earlier section (2.3.5) actually has a MUST NOT covering this.
"The domain name, as described in this document and in , is the
entire, fully-qualified name (often referred to as an "FQDN"). A
domain name that is not in FQDN form is no more than a local alias.
Local aliases MUST NOT appear in any SMTP transaction."
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