diff --git a/runtime/ftplugin/mail.vim b/runtime/ftplugin/mail.vim
index 4a4c851..2a6bf4c 100644
--- a/runtime/ftplugin/mail.vim
+++ b/runtime/ftplugin/mail.vim
@@ -1,7 +1,7 @@
 " Vim filetype plugin file
 " Language:	Mail
 " Maintainer:	Bram Moolenaar <Bram@vim.org>
-" Last Change:	2009 Jun 03
+" Last Change:	2012 Nov 20
 
 " Only do this when not done yet for this buffer
 if exists("b:did_ftplugin")
@@ -9,7 +9,7 @@
 endif
 let b:did_ftplugin = 1
 
-let b:undo_ftplugin = "setl modeline< tw< fo<"
+let b:undo_ftplugin = "setl modeline< tw< fo< comments<"
 
 " Don't use modelines in e-mail messages, avoid trojan horses and nasty
 " "jokes" (e.g., setting 'textwidth' to 5).
@@ -23,6 +23,9 @@
 " Set 'formatoptions' to break text lines and keep the comment leader ">".
 setlocal fo+=tcql
 
+" Add n:> to 'comments, in case it was removed elsewhere
+setlocal comments+=n:>
+
 " Add mappings, unless the user doesn't want this.
 if !exists("no_plugin_maps") && !exists("no_mail_maps")
   " Quote text by inserting "> "