Re: Pine

["Stephen J. Turnbull" <nospam [at] sk.tsukuba.ac.jp>]

>>>>> "Richard" == Richard Stevenson <RichardS [at] advantagegroup.co.nz> writes:

    Richard> You should probably also use
    Richard> FEATURE(`accept_unresolvable_domains'),

What's this?  A decent MTA properly configured should use what the ISP
tells it its domain is in the HELO command, the Path: header it
generates should point to your account at the ISP, and it shouldn't
know about anything else.  (Well, the addressee headers are OK if you
tell it to look in them to find addresses to send to.)

If that doesn't work, the ISP should get slapped upside the head.

I suspect RI's problem is due to using the sheflug.co.uk address in
HELO.  RFC 1123 says "Thou shalt not reject mail based on malformed
addresses in the HELO command, upon pain of eternal banishment to the
UUCP domain," but lots of MTAs (including smail) can be and are
configured to do that anyway.  :-(  And it is malformed, since host
says:

steve@tleepslib:~$ host sheflug.co.uk
sheflug.co.uk has no A record (Authoritative answer)

An MX record is not acceptable in this context.

By the way, Richard I, you oughta bitch to zetnet, their DNS server
let me do a zone transfer on sheflug.co.uk.  True, you can get the
same information by banging on all the PTRs in the neighborhood, but
that's much more obviously an intentional attack.

And, as you see, disallowing malformed (== not in MS format :( ) HELOs
is a good way of discriminating against Linux clients.

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