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-rw-r--r--lisp/mail/smtpmail.el1
1 files changed, 1 insertions, 0 deletions
diff --git a/lisp/mail/smtpmail.el b/lisp/mail/smtpmail.el
index 72c9d5c196..abe0a36547 100644
--- a/lisp/mail/smtpmail.el
+++ b/lisp/mail/smtpmail.el
@@ -126,6 +126,7 @@ and sent with `smtpmail-send-queued-mail'."
This is mainly useful for development purposes, to learn about
new SMTP extensions that might be useful to support."
:type 'boolean
+ :version "21.1"
:group 'smtpmail)
(defvar smtpmail-queue-index-file "index"