Mass "Undeliverable Mail" emails from postmaster?

[Troy]

I receive hundreds of "Undeliverable Mail" emails from the
postmaster of our domain. I also get them from recipients
of email that has been sent from some unknown sender and
sometimes my email address. They tell me that I have sent
them a virus within the email--which they have blocked.
Some of them do not even have my email address as the
sender. Neither the recipient 'nor' the 'sender'
addresses are in anyones contact lists on our network. We
are running a windows 2000 server using a cisco 2500
router.
Thanks in advance to anyone who responds...

 

[Milly Staples [MVP - Outlook]]

Probably a virus - Klez is famous for this trick - the address is spoofed
and does not actually come from your domain. The address is harvested from
addresses on infected machines, so, if you had any correspondence from that
user, then they probably had your address sitting on the hard drive.

--
Milly Staples [MVP - Outlook]

Post all replies to the group to keep the discussion intact.


After searching google.groups.com and finding no answer
Troy <[email protected]> asked:

| I receive hundreds of "Undeliverable Mail" emails from the
| postmaster of our domain. I also get them from recipients
| of email that has been sent from some unknown sender and
| sometimes my email address. They tell me that I have sent
| them a virus within the email--which they have blocked.
| Some of them do not even have my email address as the
| sender. Neither the recipient 'nor' the 'sender'
| addresses are in anyones contact lists on our network. We
| are running a windows 2000 server using a cisco 2500
| router.
| Thanks in advance to anyone who responds...