For your electronic mail needs, a wonderful solution from Mozilla!  Mozilla's modern email client Thunderbird has unlimited features.

 
For example, Thunderbird has the most effective tool for detecting junk mail. You can view your mail the way you want. Thunderbird enables you to customize your toolbar and to change its look with themes.  

Thunderbird gives much importance to security. That' why, it has stringent security features such as S/MIME, digital signing, message encryption, support for certificates and security devices.

Other important features of Thunderbird are IMAP/POP support, HTML e-mail composing, quick search, address book, advanced message filtering, address completion, import tools, and the ability to manage multiple e-mail and newsgroup accounts.