[PHP/Sendmail] Can't send mails throug php mail()

[LeisureSuitLarry]

I've installed Debian Sarge stable and made no major configure changes to the system. I've installed Sendmail and PHP4. When i try to send an e-mail with a php-script:

Code: Select all

<?
$mail_addy="mail@adres";
$headers = "To: $mail_addy\r\n";
$subject = "Test bericht";
$msg = "Dit is een test bericht\nFoo foo\nbar quux!";

$ret = mail($mail_addy,$subject,$msg,$headers);

if($ret) {
    echo "Mail is verstuurd!";
} else {
    echo "Mail is NIET verstuurd!";
}
?>

It won't work. In my mail.log there's only one line in it. The main thing that catches my eye is that 'nrcpts=0'. That seems strange to me.

I can send mail through the command-line and also when i use the PEAR mailclasses and send directly with Sendmail the messages are sent and in mail.log it says 'nrcpts=1'.

What can be the problem that i can't send mail through the normal php-way?