PHP mail() doesn't work [duplicate]

Question

This question already has answers here:

PHP mail function doesn't complete sending of e-mail (26 answers)

Closed 4 years ago.

I want to script a simple registration form with activation mail and so on. But for some reason mail() doesn't send the emails, or my 3 different email accounts (hotmail,gmail,yahoo) don't receive them and therefore don't even put them in the spam folder.

Code:

<?php
    $mailto = '[e-mail]';
    $subject = 'the subject';
    $message = 'the message';
    $from = '[e-mail]';
    $header = 'From:'.$from;

    if(mail($mailto,$subject,$message,$header)) {
        echo 'Email on the way';
    }
?>

Everytime it outputs 'Email on the way' so mail() returns true, right? I really don't get it, I've even tried to turn off my little snitch (although I didn't block SMTP).

Answer 1

Check your phpinfo and/or php.ini for your mail settings and make sure you can send mail with whatever program php is trying to use. The function will succeed if the command executes but doesn't know if the mail actually went out.