tg mail: document config setting to prevent unintended mass mail sending

Addresses: http://bugs.debian.org/506306
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

diff --git a/README b/README
index fc74ff81160a826ddc4ab467d167114553c61df0..c418ff41a694b3920af6854d01f8b64f1ecc94d4 100644 (file)
--- a/README
+++ b/README
@@ -308,6 +308,13 @@ tg mail
        The '-r' parameter with msgid can be used to generate in-reply-to
        and reference headers to an earlier mail.
 
+       Note: be careful when using this command.  It easily sends out several
+       mails.  You might want to run
+
+               git config sendemail.confirm always
+
+       to let `git send-email` ask for confirmation before sending any mail.
+
        TODO: 'tg mail patchfile' to mail an already exported patch
        TODO: mailing patch series
        TODO: specifying additional options and addresses on command