Hey camel,
thanks for your reply. Keeping this check for the rest of the world is ofc essential.
I tried what you just told me and I'm still receiving error messages. I'll post the part of my main.cf, maybe you can check if I did something wrong?
smtpd_reject_unlisted_recipient = no
smtpd_sender_restrictions = permit_sasl_authenticated, check_policy_service inet:127.0.0.1:7777, permit_mynetworks, reject_sender_login_mismatch
kind regards,
igot2b