What is Opera Mail?
Opera Mail (formerly known as M2) is the email and news client developed by Opera Software. It was an integrated component within the Opera web browser from version 2 through 12. With the release of Opera 15 in 2013, Opera Mail became a separate product and is no longer bundled with Opera. Opera Mail version 1.0 is available for OS X and Windows. It features rich text support and inline spell checking, spam filtering (both automated and Bayesian), a contact manager, and supports POP3 and IMAP, newsgroups, and Atom and RSS feeds.