Hi, I wanted to enabled "Reject sender and login mismatch", because I think its a sensible solution for most users. But I want for specific accounts, which I control myself (like remote webservers...) that those can send from any address they want. I see the "mysql:/etc/postfix/mysql-virtual_sender.cf" comes before the reject, so from what I known, getting the permission in there would solve my problem. But I did not succeed in finding the right spot for this, any configuration I do in Relay Recipients and Transports does not change anything. Anywhere in this forum it always says "mail_access" should be empty: https://www.howtoforge.com/community/threads/relay-access-denied-when-sending-from-mail-client.63329/#post-303082 Is this table only to disable mail access, or am I unable to find the right spot to do this? I hope this is not an already answered question but I searched already for a solution here and found nothing.