On 17 Apr 2002, Stian Grytoyr wrote:
> My suggestion is to have some option that can be enabled,
> which makes Exim log invalid HELO/EHLOs with a warning to
> mainlog (or perhaps some other log file), but without an
> error being sent to the "offending" server. I don't know if
> anyone else sees the need for this, but I think it would be
> neat :)
I can think of several ways of doing this, all of which make use of the
$sender_helo_name variable.
(1) Put something in a system filter:
if $sender_helo_name matches ... then logwrite ....
(2) Put something in an ACL
warn logmessage = bad helo $sender_helo_name from $sender_host_address
condition = ${if match{$sender_helo_name}{...}{yes}{no}}
where in each case you need a regular expression that matches bad names.
Actually, it might be easier to write a regex that matches good names,
and turn the tests the other way round.
--
Philip Hazel University of Cambridge Computing Service,
ph10@??? Cambridge, England. Phone: +44 1223 334714.
