Hi,
In my (albeit limited) experience of running a mail
server this is
something that is seen as a big issue (possibly just for newer domains)
- having had a similar issue it was resolved almost immediately by
fixing the PTR records - doing a reverse lookup on your mail server's
address should match how it identifies itself (If it claims to be
mail.a.com <http://mail.a.com> when connecting then the PTR for its IP
address should be
mail.a.com <http://mail.a.com>).
That is relevant at the SMTP level. AIUI, Nigel was talking about what
appears in the MX record.
Regards,
@ndy
--
andyjpb(a)ashurst.eu.org
http://www.ashurst.eu.org/
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