Chris Edwards <[EMAIL PROTECTED]> said, in message [EMAIL PROTECTED]:
> On Wed, 10 Oct 2007, Graeme Fowler wrote: > > | Given that you've explained three times now what you're doing, and I > | still can't see where you're generating your blacklist, I can see a > flaw | here. If a user sends a message to, for example, a person the > BBC with a | sender address of [EMAIL PROTECTED], and the person > at the BBC | responds, will that mean the BBC's outbound MX farm will > end up | blacklisted? > > Hi, > > As you know, Alun's talking about SMTP connections to hosts which are > not supposed to receive external mail. My reading is there are two > cases: > > - Where the recipient email address corresponds to some host > under *.aber.ac.uk, then the attempt will simply be rejected > cleanly with no further penalty. > > - Only where the recipient address corresponds to something external > (ie. a relay attempt) will the connecting IP be added to blacklist, > to be used by the main MXs etc. > > The former case is an innocent mistake, whereas the latter is > normally malicious. Like Chris said :-) Wish I could have put it so plainly... Of course, the clean rejection is actually cleaner than the original situation where the BBC's outbound MX farm would have kept battering at a closed port for a week before bouncing a timeout message to the sender. Interestingly the system has just blacklisted JANET's relay testing system! Cheers, Alun. -- Alun Jones [EMAIL PROTECTED] Systems Support, (01970) 62 2494 Information Services, University of Wales, Aberystwyth -- ## List details at http://lists.exim.org/mailman/listinfo/exim-users ## Exim details at http://www.exim.org/ ## Please use the Wiki with this list - http://wiki.exim.org/
