diff --git a/runtime/ftplugin/mail.vim b/runtime/ftplugin/mail.vim
index 3cef84f..de88f4d 100644
--- a/runtime/ftplugin/mail.vim
+++ b/runtime/ftplugin/mail.vim
@@ -1,7 +1,7 @@
 " Vim filetype plugin file
 " Language:	Mail
 " Maintainer:	The Vim Project <https://github.com/vim/vim>
-" Last Change:	2023 Aug 10
+" Last Change:	2025 Feb 20
 " Former Maintainer:	Bram Moolenaar <Bram@vim.org>
 
 " Only do this when not done yet for this buffer
@@ -10,7 +10,7 @@
 endif
 let b:did_ftplugin = 1
 
-let b:undo_ftplugin = "setl modeline< tw< fo< comments<"
+let b:undo_ftplugin = "setl modeline< tw< fo< comments< commentstring<"
 
 " Don't use modelines in e-mail messages, avoid trojan horses and nasty
 " "jokes" (e.g., setting 'textwidth' to 5).
@@ -24,6 +24,9 @@
 " Set 'formatoptions' to break text lines and keep the comment leader ">".
 setlocal fo+=tcql
 
+" Set commentstring to quoting sign ">" so comment shortcuts can be used to
+" edit quoted parts of mail
+setlocal commentstring=>\ %s
 " Add n:> to 'comments, in case it was removed elsewhere
 setlocal comments+=n:>