MyBB Community Forums

Hello, I've been having a weird problem for around two weeks.

The account activation email is not being sent. I've tried registering myself and it sends emails only to server-side mailbox. Email logs in ACP show nothing.
I created .php file with this code:

<?php
mail('[email protected]', 'Test email', 'Test');
?>

And it didn't send any email, but when I changed it to:
[email protected]
the new email appeared instantly.

Temat	Test email
Nadawca	[email protected] (league) Add contact
Odbiorca	[email protected] Add contact
Data	Dzisiaj 12:04
Test

I wonder what [email protected] is, because email in ACP is set to something different.

Thanks in advance.

Ask your hosting provider to check if your mail account had been blocked!

But email is being sent, but only if user's email is '@leagueoflegends.pl', which is hosted by server.

No email for anything on my forum works;

Send a member a email; not work.
Registration notify administrator email; not work.
New post in thread notification; not work.

Does anyone know how to set this?!! It should be built in.