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Le 04/10/2010 21:37, Alfonso Alejandro Reyes Jimenez a écrit :
> Hi, everyone.
> I have an issue with some users that are spoofing our mail server,
> rightnow we can restrict the spoofing on the same server.
> But if they use another smtp server pretending that they are on our
> domain the can send those emails.
That's a FEATURE in smtp...
> I use to work with websense which can be configured to get only mails
> from the users and ip address that belong to the domain, is there some
> way to tell postfix that he owns the domain mycompany.com and it
> reject everything that pretend to be the same domain?
> Or any other idea to prevent the outside spoofing?
you can certainly do
mydomain.example REJECT blah blah
.mydomain.example REJECT blah blah