diff --git a/mail.php b/mail.php
index da3fef0..928fc6d 100644
--- a/mail.php
+++ b/mail.php
@@ -1109,7 +1109,7 @@ class mail
     if (substr ($value, -1) !== "\n" &&
         substr ($value, -1) !== "\r" &&
         substr ($value, -2) !== "\r\n")
-      $value .= "\n";
+      $value .= "\r\n";
     if ($sectionID === null)
     {
       $sectionMainID = $this->sectionMainID ();