A little less than 2 weeks ago my web host deleted one of my domains (on a reseller account) without telling me. When I inquired about it they said that the account had received around 55,000 emails and they had to delete the account because of the server load. They agreed to move the account to a new server if I would take care of the mail problem, but they gave me absolutely NO information as to where the emails came from or anything. After only a few days the account on the new server was deleted but this time the host at least told me that it was deleted. This time the domain had received nearly 1 MILLION emails in something like 2 days. They can't (or won't??) help me out with tracking down this problem. The only information that they will give me is that this is probably a mailbomb and the emails are addressed to a variety of random addresses (none of which are real email accounts at this domain).
What causes a mailbomb, and more importantly, how do I get it to stop?? Without finding and eradicating the cause of the mailbomb this will most likely continue if/when I move the domain to a new host. There is no web host in the world that would tolerate this level of email abuse and my clients certainly don't want that much spam mail coming in and going out from their domain. Can anyone give me any clues as to what to do about this?? The web host that the domain got booted from is no help at all.
