M2 (email client)

The M2 email client is built into the Opera web browser. It is unlike most other email clients, but after a little practise it becomes second nature. It has excellent spam filtering, supports POP3 and IMAP, newsgroups as well as RSS newsfeeds. It can display text and HTML emails and uses the Opera layout engine to display HTML rather than Internet Explorer to avoid many security hazards that may happen with Outlook/Outlook Express.