Hi All, We have a problem and I can't see how to solve it. I opened my mailbox this morning and there were about 8 System Admin "Delivery Failed" messages in there. The messages of which I did not send, but they failed delivery came back to me. What does this mean? That my account is being used to relay mail? As I understood it, I thought Exchange 2003 was locked down against relay by having Anonymous+Authentication enabled. Obviously some little devils are still finding ways to send mail as me, or try to spam others via my address somehow. Any ideas on what i can do to stop this? Chriz.

Hi, Most likely this occurs because a spammer has spoofed your e-mail address. You will therefore get all the non delivery reports thats caused by the mails not being delivered. Nothing you can do about it. Leif