mail() error, characters !! in message

[Anon]

While using the mail() function with following extra header information;

$extra_header="From: " . $from . "\nCc: " . $cc . "\nContent-type: text/html;\nMIME-Version: 1.0";

mail($to, $subject, $message, $extra_header);

We receive "!!" characters after about 920 bytes of information in $message.
Does anybody know the solution to this problem?
PHP runs on a Linux server with Apache webserver.

Richard.

[Anon]

First of all, you should use \r\n in mail headers (the standards say so).

Now, please try using your code to send a message to [e-mail] and let me see an actual mail.

[Anon]

It seems that the message body needs \n as well. What we did is to put html in the $message without using \n characters and write it all at once. This is when the error with the !! occurs. So the right solution is to put a few \n between the html in the message body.

Thanks Troels!