Just had a call from a client we're building a site for but they have their email hosted elsewhere. Their IT guy is away on his Hols and called me for help. They have a mail server thats spitting out emails (45'000 in one week) to one company and need a bit of help to stop it. (or their ISP is cutting their connection) I know it will be a trojan of some sort, but scanning it on Bootup will bring it down for hours. Not good. Is their a way to add a domain that the server does NOT send to. i.e the server can't send emails to @123ABC.com as a temp measure? Any help very welcome!