It looks as if someone, or something, is spoofing our company url - I hope that I am using that term correctly. To elaborate, we are receiving literally hundreds of "undeliverable" mail messages each day addressed to fake members of our staff. Here is an example:
Your message did not reach some or all of the intended recipients.
Subject: Your Account is Suspended
Sent: 7/7/2005 7:08 AM
The following recipient(s) could not be reached:
helen@our_address.com on 7/7/2005 8:53 AM
The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
Helen does not exist of course. I have a somewhat limited understanding of how it might be possible to combat this - does anyone have any suggestions for me?