Got it. Find this code in the main php page.
[code:1]
$mailtext = stripslashes($mailtext);
$mailtext = wordwrap($mailtext, 70); // Just to be safe that SMTP-send works
$subject = stripslashes($subject);[/code:1]
put this in between the second and third lines:
[code:1]$mailtext = str_replace('\r\n', "\r\n", $mailtext); // Replace Windows breaks (rn)[/code:1]
All fixed.
delimiters FTW!