Characters missingin mail source???

Hi again. I've got this annoying problem. I made a program that sends mail to my customers, like a newsletter. The mail is in HTML and each mail is about 2000 chars, depends on the customers info. The problem I have is that there is a lot of characters missing in the mail source when the mail is delivered. Ex: "<tr><td>2003-03-03</td></tr>" shows like this in the email source "tr><td>203-03-03</td/tr>" there is no logical structure for which characters is missing, it's different everytime. Im running apache 1.3.28 and PHP 4.3.3, I tried IIS with PHP 4 and 5 with the same result. The source for the mail is stored in a normal $message = array(); where $message[$id]; is the mail source for the specific customer. If I print $message[$id] from the program everything show correctly. mail($mail_to, $subject, $message_head.$message[$key].$message_foot, "From: Redaktionen <redaktionen@lokalguiden.se>\r\n" ."MIME-Version: 1.0\r\n" ."Content-type: text/html; charset=iso-8859-1\r\n" ."Reply-To: redaktionen@lokalguiden.se\r\n" ."X-Mailer: PHP/" . phpversion()); Should I change something? Any idea what I should do??