I have a redhat 9 server with postfix and dns for "www.mydomain.com
". I have been receiving weird e-mails such as "firstname.lastname@example.org", also e-mails with several domains that i suspect are being originated from my own server.
How can i restrict my mail server to accept only outgoing e-mails originated from my lan 192.168.0.0/255.255.255.22
4 and also for the webmail interface in www.mydomain.com/mail
Thanks a lot !