gomichild

The solution and a how-to guide can be found here:

https://www.souzouzone.jp/blog/archives/009531.html

Yay!

This might help:

https://www.economysizegeek.com/wp-mail/faq/

If you get POP3: premature NOOP OK, NOT an RFC 1939 Compliant server

edit wp-includes/class-pop3.php
Ignore the numbers at the begining of the line they are there for reference
goto line 107
107 $this->BANNER = $this->parse_banner($reply);
108 $this->RFC1939 = $this->noop();

Insert
107 $this->BANNER = $this->parse_banner($reply);
108 return();
108 $this->RFC1939 = $this->noop();