Has anyone had any experience installing DomainKeys in IIS? A Google search seems to suggest that DomainKeys cannot just be "plugged in" to the MS SMTP service. I'm happy to use a third-party component (if said component is cheap / free - ideally with .net source code) to send DomainKeys verified mail, but have no idea what component would do this. (At least - a component that you can download ready built. sendmail.org has one that requires a million steps to build and install it and needs about 3 other programs installing / building.)

I havent used this before to be honest. A quick look around Google revealed that Exchange has a library but not MS SMTP.

I have found something for the mail server we use to allow a program to run on the MTA (MailEnable). http://forum.mailenable.com/viewtopic.php?t=8166

Not sure if this helps any. Maybe you could force the SMTP email to route through ME instead of MS SMTP.

Sounds about right

Yeah - I saw ME's ability to do it. Unfortunately, this is for a server without any need for MailEnable.

Thats a shame! No chance of you installing ME Standard which is free? I know installing extra software can complicate things more sometimes though