--- a/includes/mail.inc	Tue Dec 23 14:29:21 2008 +0100
+++ b/includes/mail.inc	Tue Dec 23 14:30:08 2008 +0100
@@ -1,5 +1,5 @@
 <?php
-// $Id: mail.inc,v 1.8 2008/01/25 17:04:00 goba Exp $
+// $Id: mail.inc,v 1.8.2.2 2008/04/02 08:41:30 goba Exp $
 
 /**
  * Compose and optionally send an e-mail message.
@@ -187,6 +187,8 @@
       // Note: e-mail uses CRLF for line-endings, but PHP's API requires LF.
       // They will appear correctly in the actual e-mail that is sent.
       str_replace("\r", '', $message['body']),
+      // For headers, PHP's API suggests that we use CRLF normally,
+      // but some MTAs incorrecly replace LF with CRLF. See #234403.
       join("\n", $mimeheaders)
     );
   }