SMTP and POP3 RESTRICTION
i want to make some restriction.
i've ISPConfig instaled and work very good, but i have some sequrity hole.
when i use php mail() from other server i can send e-mail!!!
here is php simple code:
mail('firstname.lastname@example.org', $subject, $message, $headers );
How can i restrict that!?
i've found somthing about this problem in internet, but i don't know that it is right:
if this work, how can i maket it work with ISPConfig installation