Hello, suppose I have a server "mail.mydomain.com", and I have disabled SASL authentication on port 25
smtpd_sasl_auth_enable=no and I only allow authentication on port 465. Therefore, all emails originating from mydomain.com should be submitted via 465. There should never be legitimate sender from=<f...@mydomain.com> on port 25 How can I block all spammers who try to submit on port 25, using @mydomain.com as their from address? thanks,
