Mail problem

[wchris]

Hi people,
I´m using the mail()-function from PHP, but I have a problem with the "Reply-To:" header.

My Code:
$mail = mail ($mail_to, $mail_subject, $mail_message, "FROM: " . $mail_from . "\nReply-To: " . $mail_reply_to);

The problem is that the email wont be send if I have more than a specific number of reply-to entries (>20 I think). Often the mail has up to 200 reply-to entries.

Thanks to every hind,
Chris