dalmate:

The ingoing and outgoing mails are good, already tested.

You must add "reject" (or change the last "permit" to "reject") in /opt/zimbra/conf/postfix_recipient_restrictions.cf

good...

Thanks for reply.
I found a solution for my issue.

I checked my main.cf and under smtpd_recipient_restrictions was the parameters "permit_mynetwork", "permit_sasl_authenticated" and others checks...

I have checked several thread with issues similar to the following, but i don´t find a clear answer.

My server has auth TLS enable but also permit to send mail to my domain users without any auth....