Do you mean to don’t write some message to root@xolat.games? 🤔
You can, but most email servers redirect mail to root@xolat.games to some other user eg xolatgames@xolat.games. The root user usually does not have their own inbox.
I'm not sure why hello is trying to write to /home/root then, that's your problem. Do you have any Postfix aliases set up? Check /etc/postfix/aliases (there's a chance it's in a different location; the output of postconf alias_maps will tell you where it is).
But what’s the configs do you need? 🤔 Dovecot has about 20 separated configuration files! Do I will need to put each of them?
Just post the output of doveconf -n. Redact any sensitive info.
I don't really hoard them. I keep a collection of ISOs on a 16 GB Ventoy drive, but that's not a lot.