You know I'm actually looking for an email service that offers residual income for marketing or seo firms. I'm currently using Exact Target but their partner fee is $5000 a year. Good results, they have awesome tools, good phone tech support, but I think I can find another solution for less money.
Sites I've found so far are -
http://www.exacttarget.com
http://www.myemma.com
I'll prolly be moving away from exact target pretty soon as constant contact is looking better & better -
http://www.constantcontact.com/partn...tner/index.jsp