Campaign Monitor - www.campaignmonitor.com

I recently used Campaign Monitor for the first time and I am AMAZED by how great it is. In the ecommerce world it's surprising how many people ask you to recommend an email campaign system, my response from now on will be Campaign Monitor. It's ridiculously easy to use and the tracking tools are out of this world.

They also offer the best support system I have ever experienced, the guys are very technically gifted and go far beyond what I expect.

I can't recommend Campaign Monitor enough!