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Subject: Re: `user-mail-address' for message-ids
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"Jason R. Mastaler" <jason@mastaler.com> writes:
> But you haven't provided any proof of this "standard" of requiring the
> fqdn (and nothing else) of the running system to make up the rhs.

See RFC1036, 2.1.5.

> I may be wrong, but it doesn't seem likely to me that several distinct
> and intelligent groups of software developers (mutt, mozilla, qmail,
> etc..) would have goofed so badly if this is an established standard.

They don't goof, in themselves.  They just make it easier for you to
make them goof.  It's possible to use, e.g., qmail's idhost to change
the domain in Message-IDs in such a way that uniqueness is still
guaranteed, although this might technically be a violation of the RFC.
It's also possible to misuse these features, and misuse would be much
more common than benign use in the case of user-mail-address.


paul