Best E-mail Marketing Services

I asked hundreds of small business owners which e-mail marketing service they used, trusted and would recommend to others. The companies that received the most votes are the services you see listed here.

I had two main criteria for an e-mail marketing service to make my list:

1. Proof of Customer Satisfaction. The service must have legitimate, verifiable customer testimonials. If I couldn't verify the testimonials, I didn't list the service. It's that simple.

2. Stability. The service must have an online track record of at least three years.

Following are the results of my survey, listed alphabetically:

Boomerang
http://www.boomerang.com
http://www.boomerang.com/Page/Testimonials.aspx
Online since: 1994

Constant Contact
http://constantcontact.com
http://www.constantcontact.com/customer-examples/index.jsp
Online since: 1998

e-PostDirect
http://www.epostdirect.com
http://www.epostdirect.com/testimonials.aspx
Online since: 1998

iContact
http://www.icontact.com
http://www.icontact.com/about/testimonials
Online since: 2006

Vertical Response
http://verticalresponse.com
http://www.verticalresponse.com/about/customer-testimonials.html
Online since: 2001