www.mailarmory.com
I have set a few clients up with this mail washing service and have recently started one of my domains on it.
It has AV and AntiSPAM filtering and does a great job.
One of the features I liked about the service is that each user can easily choose their own level of tolerance from a scale of 1 to 10, they can create their own white and black lists , as well as personally review captured email intended for them and choose how to process any false positives as needed.

I also like the fact that you can have the service reject all mail sent to your domain that does not have an address defined. This type of mail taxes your servers more than any legit mail buy a huge percentage.


It requires an mx record change as they become the primary mail exchanger and they make the direct delivery to your mail servers. You can of course list your servers down the line to ensure delivery in the event of problems with the service.

They have special pricing for corps and ISPs.

It's a nice compliment to an existing corporate AV install.

Take a look and let me know if you have any questions about it...

SGS