problem with mail()

Hi, I'm using the script below to send ascii files attached to mails via mail(). I'm running the script on different servers and it works fine. Now I got a problem on windows server 2003. The attachment of the mail is disturbed, the first 76 characters are missing, the rest of the attachment is correct. When I looked at the mail headers of the mail I recieved I recognized that there were some lines missing. Also the first line of the attachment part in the header is mssing. As I use chunk_split without the chunklen paramter the lines are all 76 characters long. So it just looks like that the server ommits lines in the header. I marked the missing lines in the script with comments. Has anybody got an idea where the problem could be? Thank in advance Stefan $unique_sep =md5(uniqid(time()))"; $headers = "From: egrade questionaire\n"; $headers .= "MIME-Version: 1.0\nContent-Type: multipart/mixed;boundary=\"$unique_sep\";\n"; #The second \n at the end of the next command is ommited, the resulting empty line is not in the header of the received mail $headers .= "charset=\"iso-8859-1\"\nContent-Transfer-Encoding:7bit\n\n"; $headers .= "egrade-result\n"; $headers .= "If you read this text your mail server is not supporting MIME Format.\n"; $headers .= "--$unique_sep\n"; $headers .= "Content-Type: text/plain; charset=\"iso-8859-1\"\n"; #The second \n at the end of the next command is ommited, the resulting empty line is not in the header of the received mail $headers .= "Content-Transfer-Encoding: 7bit\n\n"; #From the next command only a single \n is in the header of the received mail, the text and the other \n are missing $headers .= "egrade-result\n\n"; $headers .= "--$unique_sep\n"; # filename holds the path to the ascii file $headers .= "Content-Type: {text/plain}; name=\"{$filename}\"\n"; $headers .= "Content-Transfer-Encoding: base64\n"; $headers .= "Content-Disposition: attachment\n\n"; $filedata = implode(file($filename), ''); $headers .= chunk_split(base64_encode($filedata)); $headers .= "--$unique_sep--\n"; if(mail("sts@soucon.de","subject","egrade-result",$headers) or die("An error occured! The questionnaire has not been processed"));