Can Postfix be configured to send mail from a server without a domain?

Question

postfix

We decided to start a server on the local network for services for internal use. The server is accessible by IP from inside the network, it does not have a domain name for access from the Internet.
Task: set up sending emails from this server to external mail servers. How can I do that?

Answer 1

This can be done using a Gmail account, for example