Tips on choosing an ISP that fits your needs:
A. Internet services usually come with your phone company or ISP vendors on your local yellow page.
B. Your ISP must provide stable Internet connections for a mail server with no Internet access is most likely uesless.
C. Subscribe to an Internet service plan that offers static-IP from your ISP
D. Inquire your ISP if they support IP reverse resolution. This service enables you to define your own IP reverse resolution value. Hence, the resolution value does not contain common spam keywords such as pppoe, dynamic, dialup and dial-up.
E. Do not choose cable broadband services for which static IP and IP reverse resolution features are not availabe.