Tony Johansen said: >This morning I have 8 e-mail delivery failures for e-mails I did not send, >each addressed to various names like Ted and Brent etc @ my own domain. >They were returned with the 'reason' of being infected with worm Mytob.T-2 > >So is it time to invest in Intego AV? Or is this not something to worry >about? Appreciate advice. This actually has nothing to do with your Macintosh. Someone with a Windows computer, and your e-mail address in their address book, has a virus, and the virus is propagating itself by sending out "spoofed" infected e-mail messages with return e-mail addresses gleaned from the infected computer's address book. (That is, your e-mail address.) There is nothing that you can really do about this. Installing anti-virus software on your Mac won't help, because it isn't your Mac that is infected. See: http://www.plattsburgh.edu/help/virus/spoof.php Randy B. Singer Co-Author of: The Macintosh Bible (4th, 5th and 6th editions) Routine OS X Maintenance and Generic Troubleshooting http://www.macattorney.com/ts.html