Gmail

I'm a big fan of Gmail, so much so that I have not used a POP Account (such as alliant.nb.ca or sympatico.ca) for four years. It is Google Mail and offers over 2.5 Gigabytes of storage and over 10 mb downloads in a single mail message. It has a clean interface and is considered more secure than Yahoo which has a good reputation for it's mail client. Unfortunately it bogs you down with downloading Yahoo software etc. MSN's Hotmail is one of the worst for security. So I always recommend Gmail... and also Firefox for your Internet browser (I have Internet Explorer on my desktop but NEVER use it... too many spyware and virus vulnerabilities).

Here is a site that gives a Gmail and Firefox user over 30 tools to help improve the experience:
http://www.makeuseof.com/tag/gmail-craze-30-tools-to-make-your-gmail-better/