Opera scores on its built-in spam filter function

I use Opera 7.02 for browsing and e-mail. I find the Opera client faster and more secure than any Microsoft offering. But I have a question about the M2 mail client included in Opera.

M2 features a built-in spam filter. This is a great idea as about 70 per cent of the e-mail I receive is spam (partly due, I believe, to someone entering my e-mail address in a send-this-to-a-friend Web site).

The spam filter automatically identifies the correct e-mail as spam and then saves them into a separate spam folder for review, just in case it got a legitimate e-mail and marked it as spam.

Once I have reviewed the incoming spam and am satisfied that it is what it is categorised as, I want to delete the contents of this folder in one go. (I do not have a large hard disk, and I do not want to store this junk on my machine. It was bad enough that I had to download it in the first place.)

Does M2 automatically empty the spam folder every few days, or is there a way to dump all the spam in one go instead of going through the spam folder and deleting each spam manually?

I have checked in the Opera Help files and on its Web site, but there is little information on this.

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