From a discussion i had many years ago with an ISP re the desire to reduce (or try to eliminate) a horrendous amount of spam i was told the following. Changing anything other than the account itself will not provide the relief as every other change will still lead to your account. Which is where the spam is aimed at. I have also sent a direct advisory to the O/P advising against the use of an e-mail address as a forum I.D. truenorth
truenorth, I think maybe you did not understand the OP's problem.
It's not spam coming in he's talking about.
He wrote:
Mail-Deamon Failure Notice
For the past week I have been getting about 10-20 of these a day
what I didn't know is why is my mail box full of them when I don't send any messages out of that address.
Here is the answer:
1. If you did not send these messages, someone is falsely using your email address as a FROM or REPLY TO address for spam messages they are sending. You are getting the invalid TO addresses. There is nothing you can do. They are not using your account.
2. They probably harvested your email address from the web because you used it as a forum screen name or made it public in some other way.