--On 14 January 2010 14:52:40 -0600 Don Lee
<spfdiscuss(_at_)caution(_dot_)icompute(_dot_)com> wrote:
On the one hand, CNAME for HELO is all too common (and accepted - wrong
though it may be), but HELO that does not resolve, or does not have
port 25 open on the resolved IP is more and more commonly the reason
for mail from that server being rejected.
There's no reason that my sending mail server should have port 25 open.
Many sites separate their outbound and inbound servers. Sender
verifications rely on MX records, which could point anywhere.
--
Ian Eiloart
IT Services, University of Sussex
01273-873148 x3148
For new support requests, see http://www.sussex.ac.uk/its/help/
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