Name some good email programs for mac?

Mac OS X Mail is a feature-rich solids, and the elimination of spam, but also a very nice mail client and easy to use.

Mozilla Thunderbird - Free Email Program Mac

Mozilla Thunderbird is a full, secure email client and very functional. Allows you to handle mail efficiently and with style, and Mozilla Thunderbird filters away junk mail too.

Opera - Free Email Program Mac

The Opera email client is a slick and flexible interface that will satisfy almost all your need se-mail, and Opera integrates RSS into this experience too. Some may find the message editor lacks a bit in power, and lack of support for encrypted email is unfortunate.

Mulberry - Free Email Program Mac

Mulberry is a powerful email client and incredibly versatile available for all popular platforms. If there is something Mulberry lacks, which is simplicity.

Mailsmith - E-mail program
Mailsmith, the mail client from the makers of BBEdit, is so powerful and rich in features liketext editor. It's a shame Mailsmith supports POP accounts, and - enhancing properly - rich text editor could be a clear addition, too.