Strange Exchange 2000 E-Mails

[uplinx]

For the past couple of days our Exchange users have been recieving strange emails, sent from themselves.

Thesubject is a string of numbers: 1545453 for example and the message content itself: 5556

We have no idea where these are appearinf from and out Virus scanner has not thrown up anything suspect.

Has this occurred with anyone else?

 

[Zelandakh]

Yes - there is a lot of it about. The numbers are random so it is difficult to filter them out.