Security experts have warned that yet another new variant of the malicious computer worm Mimail is on the loose.

Mimail-L spreads via email and attempts to launch an attack against websites run by organisations who fight spam.

The worm arrives by an email claiming to be from Wendy with the subject Re[2] and an attachment called Wendy.zip, which contains the worm.

According to security expert Sophos, the infected message regales an erotic meeting between Wendy and Greg and offers naked pictures.

If web users open the attachment and run the program inside, for_greg_with_love.jpg.exe, their computer will be infected. Mimail-L attempts to forward itself to all email addresses it can find on the infected hard drive.

Mimail-L also sends a second message with the following subject: 'We are going to bill your credit card', claiming that the recipient's credit card details have been debited and that child porn CDs will be send by post.

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