[Mimedefang] Revisit: Filtering on HELO

David F. Skoll dfs at roaringpenguin.com
Mon Mar 26 12:40:13 EDT 2007

Kevin A. McGrail wrote:

>> The server shouldn't worry its pretty little head over such things.
>> Except in blatant cases of obvious lying (eg, client claiming to be
>> server's public IP address), the server has no right to impose
>> assumptions about what a client should use as its HELO name.

> David, in your opinion, based on the RFCs, do you agree the name should
> be bracketed IPs or a FQDN though?

Oh, yes.  If the *syntax* is wrong, then the server can complain.
But it shouldn't complain if a machine HELOs as [] when
the connecting address is, for example.



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