How to configure send/receive mail using AIO package?

[0ljik]

I want to send/receive emails on my backend apps using all-in-one package. But having problem finding any information or line that helps with:
5.5.4 You are not allowed to send from this address.

And when sending to the server:
550 5.1.2 Relay not allowed.

I setup everything with default selections like RoksDB and internal account system. First I tried to deploy on kubernetes with jetstack certs, but having this problem thought I am stupid and don't understand what's wrong. But after trying to deploy it on VM came across the same problems. There is nothing useful on the docs about setting up, only installation and what configurations does it have.

[mdecimus]

Please check the must-match-sender option, see https://stalw.art/docs/smtp/inbound/auth