I'm hoping I could find some help here. My situation is--I'm receiving tons and tons of spam emails from the contact form scripts from my website using my own domain name. This is the screenshot http://weevox.com/misc/spamemail.gif
I asked for support from my host, but according to them there's nothing they could do about it but just wait for the spammer to remove me from their list.
It's very frustrating I had to remove the script from my site to avoid this. I have been block from the server because of this. The forms from my site is useless and it has been very inconvenient for prospects. My host has given up but I'd like others' suggestion if there's any other solutions for this.
Try using http://nms-cgi.sourceforge.net/scripts.shtml (compat) and rename the script to something else than formmail and make it something more obscure. As long as you configure it properly you should have less of a problem.