[MLB-WIRELESS] Problems with wireless.org.au MX

[Simon J Mudd]

orlock at central.warehouse.net (James Robertson) writes:

> And at this moment, i'd just like to say that other mail problems might be 
> caused by your ISP not assigning reverse lookups correctly, causing some 
> anally configured SMTP servers to reject them, as the From: address and 
> the hostname sending dont make any sense!

It is common (though not very) to verify that the HELO/EHLO greeting
given by the SMTP client is a valid name.  This is perfectly valid
even if a large number of sites don't setup their mail servers
correctly and thus can lead to lost mail.

It is also common to check that the envelope_sender address is in a
valid domain, because if it is not you won't be able to reply to the
person anyway and indicates that the address is wrong (and may be from
a spammer).

Mail servers that reject mail like this are just trying to filter out
spam.  I receive a lot of mail and filtering this way avoids me
receiving a lot of junk.

It's a shame that a lot of people don't know how to correctly setup
their mail servers.

Simon
--
Simon J Mudd,   Tel: +34-91-408 4878,  Mobile: +34-605-085 219
Madrid, Spain.  email: sjmudd at pobox.com,  Postfix RPM Packager

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