up vote 4 down vote favorite
1
share [g+] share [fb]

Having read Jeff's blog post about Email and DKIM, I'm thinking it might be good to DKIM all mail coming out of our Exchange 2003 servers. Whats a good way of going about that?

link|improve this question
75% accept rate
feedback

1 Answer

up vote 3 down vote accepted

No version of Exchange supports DKIM. Microsoft has put their support behind SPF/SenderID instead. There are a couple third-party products that can be added to Exchange to do DKIM (like this, for instance) but I personally wouldn't run that stuff on any of my Exchange servers. The more common approach is to have another server (or servers) sitting between Exchange and the internet running a more secure MTA that can do the DKIM for you.

link|improve this answer
2  
While I agree with you on your DKIM statements, I disagree with your insinuation that Exchange's MTA isn't secure. It's not the MTA that's insecure it's the admins who don't configure Exchange correctly that makes it insecure. – joeqwerty Apr 23 '10 at 14:50
2  
Too bad about Microsoft's attitude on this, as things like SPF and DKIM are complementary, not in opposition. Quite simply, having both lowers the spam score more than having just one of them on all the test systems I've seen so far, as well as the production spam filters I've looked at. – John Gardeniers Apr 28 '10 at 12:17
@joequerty Why does microsoft recommend the use of edge transport server? – Yottatron Apr 10 at 10:22
feedback

Your Answer

 
or
required, but never shown
discard

Not the answer you're looking for? Browse other questions tagged or ask your own question.