Exchange Defender does what it says, cheaply.

For $2 a user you get inbound and outbound spam and virus protection and web filtering, web file sharing, LiveArchive, encryption, archiving & compliance, and reporting. LiveArchive is a Microsoft Exchange 2010 Outlook Web Access login that you can use anytime; if your server is down your clients can still send and receive e-mail like nothing had happened!

We have been Exchange Defender partners for over a year now and are happy. We love the fact that they only sell to the channel - your client cannot buy direct. There is also easy branding that doesn't quite hide the ExchangeDefender brand in some places Autotask integration makes billing easy.

Support could be better and has improved. They are out of the US and do resolve the problem, but we wish they could do it a little faster.

Setup is pretty easy. You can type it all in by hand or run their VB script on a DC and upload the CSV file that is created.

There is also an Outlook plugin and a Windows tray application that will alert users when something hits their quarantine.

Interface: We like the fact that we use 1 console to control all of our clients and we can provision a new client instantly without waiting on someone else. The interface is pretty simple, however the design is confusing in a couple of places and can make you hunt for some options.

Overall a good product that does a pretty good job of filtering mail with a lot of features, at the right price.