Franco wrote: > Sorry, i speach very bad english, > i'm already installed spamassassin with clamav antivirus and > all work fine i want block the e-mail sent through my smtp > with mail from as one of my local user. > I think I understand what Franco is asking. He wants to stop an external sender (spammer) from setting their From: address to appear like its coming from his domain space and then having his MTA accept this e-mail for local delivery. Correct? BTW: By default, sendmail should NOT be relaying (as in open relay) to anyone outside your domain space when someone sets their "From:" address to be the same as your domain space. It should accept the e-mail for local delivery only, unless overridden. Unfortunately, I don't remember how to implement what your asking using sendmail. It's a piece of cake in postfix though. Sorry! Steve Cowles