Newline virker ikke i email

Hej eksperter,

jeg har et problem med mit e-mail script og \n - newline virker ikke i e-mail. Nogen der har et bud?

$fileatt = "$fileName"; 
$fileatt_type = "application/octet-stream";
$fileatt_name = "$fileName";

$email_from = "morten@asbjorn.dk";
$email_subject = "Excel fil for brochurebestillinger pr. ". date("d-m-Y") ."";
$email_message = "Hej,\n\nher er vedhæftet \"$fileName\" med danske brochurebestillinger pr. ". date("d-m-Y") ."";
$email_message .= "\n\nListen er delt op med \"Navn - Adresse - Post nr - By - Bestilte brochurer\"";  has in it

$email_to = "morten@asbjorn.dk";

$headers = "From: ".$email_from;



$semi_rand = md5(time());
$mime_boundary = "==Multipart_Boundary_x{$semi_rand}x";

$headers .= "\nMIME-Version: 1.0\n" .
"Content-Type: multipart/mixed;\n" .
" boundary=\"{$mime_boundary}\"";

$email_message .= "This is a multi-part message in MIME format.\n\n" .
"--{$mime_boundary}\n" .
"Content-Type:text/html; charset=\"iso-8859-1\"\n" .
"Content-Transfer-Encoding: 7bit\n\n" .
$email_message . "\n\n";