[Scripting Question] Are you using MRMX-OS? I have questions about the server.

In the previous question, I did not upload the problem for the error, so I erased it and uploaded it again.

First, the login server (RMS-OS.rb) runs well, so I will skip it. The problem is the PVP server(main.rb).

I edited Main.rb and ran it.

However, it was turned off in 3 seconds.

'Connecting to the SMTP server'

After this phrase hits, it will end in 3 seconds.

What does SMTP server mean?

If you have a STMP server, give me a link

Anyway, I do not know how to solve it.

Anyone who answers my question will be my hero.

Any answer is good! If you know anything, please let me know!

Below, upload your problem photo ▼

An SMTP server is something that takes care of sending e-mails.
I don't mean to be rude but have you even tried googling the term beforehand?

I listened to you and looked up. I think I got some clues. Thank you! However, I still do not know exactly how to build an SMTP server. Anyway, thanks.