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>>I have also recieved "RETURNED BY SENDER" because their ISP would not accept the attachment - I wrote my ISP just a moment ago. This worm also falsifies the "From" address. Norton has a page about mr. sobig!
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I'm at over 50 virus-containing mails myself and definitely a few of the "senders" are names that frequent UT.

I got a "RETURNED BY RECEIVER" as probable virus too (meaning that I was a "sender" even tough I never did), so I went to the trouble (and it **IS** trouble, in my opinion) to download the Symantec eradicator, ran it, and it found NO INSTANCE of SBig...