What can I do about this?

I have my own domain name "Wonderley.com." One thing I have always loved is that I could logon to a site that required an email address with a unique email name just for email from them. Something like businessname@wonderley.com.

If for some reason I started getting SPAM to that email address I know that someone with their company sold my email address. It happens, but not too often. Best_Buy was the most surprising. Once it happens, I email the company and so far none of them seem to care. I also add a filter to block emails from then on.

However, I now have someone sending out a lot of spam claiming to be from the Wonderley.com domain. The address at Wonderley.com is most of the time just random gibberish. Bust recently there have been a lot from BatWonderleyMan@wonderley.com.

I don't know how many went out, but yesterday, in just a few hours, I had over 600 replies from "out of office" agents and "You message has been blocked" type emails.

I can add filters in order to clean up what I see, but I don't want companies adding filter that do something like "filter out anything from Wonderley.com" and I just don't like the idea of a spammer using me like that.

I have no idea how to stop this from happening. Any ideas would be appreciated.

Thanks for any help or even reading this far to see of you could help