Hello, I'm trying to prevent anyone from spoofing incoming mail as internal users. Example, my domain is mydomain.com I don't want to anyone to connection to my mail gateway and send emails as user@xxxxxxxxxxxx from the outside. I thought this can be done by access table and it's working. but the problem now is that it's rejecting local mail that it's trying to forward to the mailhost as well, how can I fix this? #access table # Check the /usr/share/doc/sendmail/README.cf file for a description # of the format of this file. (search for access_db in that file) # The /usr/share/doc/sendmail/README.cf is part of the sendmail-doc # package. # # by default we allow relaying from localhost... 127.0.0.1 OK localhost OK From:localhost OK To:localhost OK From:mydomain.com ERROR:"550 Everything that has a beginning, has an end." Many thanks, Yang
