>>>>> "Ian" == Ian Eiloart <iane@???> writes:
>> For some months now we have used a HELO ACL to delay by 35 seconds
>> all connections with suspicious looking HELOs. This is very
>> effective at reducing the amount of spam that our servers receive,
>> while not preventing "real" email getting through, because much of
>> the current spamming software seems to drop the connection during
>> the delay period.
Ian> Is 35 seconds really necessary?
Yes.
Ian> It will fall foul of sender verification callouts,
Cart/horse inversion error. In this case it is the sender verification
callouts which are violating the protocol by timing out too soon.
--
Andrew, Supernews
http://www.supernews.com
