TechTreak

I tested that was integrated with a browser rather than being a separate piece of software. While all the received e-mails are stored in the Received folder, mails with attachments are also categorised according to the attachment type—such as Documents, Images, Music, Videos, and Archives, for faster retrieval.

Integration within Opera does have its advantages. It can accept all kinds of RSS as well as Atom feeds, and these are well-sorted into folders—one per feed. This is the only e-mail client that supports all the required protocols—
POP3, IMAP, NNTP, and even Chat (IRC).

The Opera mail composer is still primitive, and does not support HTML. The lack of HTML and JavaScript support however means that this mail client is well-protected from viruses. Integration with the Opera browser also allows
you to create a new mail from just about anywhere within a window in the browser—just select text, right-click, and click on “Send by mail.”

The search option lets you specify very basic search criteria. Ditto for the message rules. Opera creates folders
when you create a filter, and filtered messages are copied to this folder. You can create filters within filters to refine the categorisation of your mail. The spam filter is Bayesian, meaning it keeps learning.

The wizards let you import mail easily. E-mails can be imported from Eudora, Opera, OE, Netscape, and Thunderbird. Unlike previous versions, versions post-9.02 don’t crash while importing Thunderbird mail.

You can take notes and send them as e-mails if required. This is the only PIM feature to be seen here. The e-mail storage location cannot be easily changed, and you need to go into the advanced configuration options to do that.
Opera Mail Client is a good client overall, but you may probably use it only if you use the Opera browser.