How to use a working mail server in proxmox?

Question

Mail server

Hello!

I set up a mailer on the container - everything goes fine, there are no questions.
But it's a sin to disappear - mail messages from the host machine with proxmox stably fall into spam, there is a server name like host-server.local - this is understandable, there are no questions here either.
Actually - how to use a configured server to send messages from the host machine?
Both servers work on the same network and have addresses
host machine 192.168.1.50
mail 192.168.1.35

Answer 1

Indicate in the smtp relay server to the mail