Need some expert help & advice please.
I manage a few web sites for a couple of domains & businesses. It appears that @#$%^ someone has seized our email addresses and is sending out spam in our name.
This is causing our web site to be suspended and being widely blacklisted.
Any emails that I do send are sent directly out from my ISP (Bigpond.net.au), the only emails that I have sent from the web sites are the occasional test ones.
Is there any way that a block can be put on the sending of emails that originate (or appear to) from our domains?
I've activated spam assassin & box trapper in cpanel. Have no idea what else I can do to try & find a fix for this problem.