Smtp without authorization + php?

Question

PHP

Guys. We have a server with ip 83.222.x.xxx
AND a specific port.
Site on Bitrix.
It is necessary that Bitrix send mail via smtp of our server.
That is, the left guys will not be able to send anything there, there is a check on the server who sends. It's me that we're not going to send spam.
The server is configured in such a way that authorization is not needed to use SMTP.
Are there ready-made scripts for sending mail without authorization via smtp in php?
Preferably without third-party libraries, but directly the function itself?
.

Answer 1

You can override or configure sendmail on the server, and use the usual mail () function in the code