On Wed, 16 Oct 2013 09:21:46 -0800 Kevin Miller <kevin_mil...@ci.juneau.ak.us> wrote:
> So if I'm reading this right, milters such as smf-sav or milter-ahead > will no longer be of any use? You are reading it correctly. On our anti-spam service, we require some sort of recipient validation so we don't go insane scanning messages destined to nonexistent addresses. SMTP call-ahead was the easiest way to do this, but now our customers either have to let us hook into their Active Directory or explicitly provide a list of valid recipients. Someone did send me a hack for doing recipient verification on Exchange 2013 which I include here for archiving purposes. Please note that I have not tested this. I'm also not familiar with Exchange, so some of the terminology means nothing to me... Regards, David. ========================================================================== From: Leon Black To: "i...@roaringpenguin.com" <i...@roaringpenguin.com> Subject: Recipient Verification correction Date: Sat, 7 Sep 2013 03:59:27 +0000 Hey Guys, Just saw your info on this page http://www.roaringpenguin.com/recipient-verification re Exchange 2013 recipient verification. I have found the workable solution with exchange 2013 to get recipient verification working correctly with an antispam product. The problem is when it is a single server with CAS and Mailbox roles. To use correct verification you need to talk to the hub transport receive connector (mailbox role) and this rejects the address as per normal. This is by default on port 2525, all you need to do is enable anonymous access on the connector and open port 2525 to the antispam IP. Set your product to do recipient verification on port 2525 and deliver to port 25 and it works perfectly. Hopefully this information can help you guys out :) We do this with a number of our exchange 2013 single server clients and it rejects emails correctly. Oh! Just make sure they do not create another hub transport connector. If there is an additional one it will cause exchange transport to stop receiving emails after a few hours.
