Note the other parts of generated message-ids in the manual.

diff --git a/doc/manual.xml.head b/doc/manual.xml.head
index 06f606772ae3795ca2f374f740fe3854a5a9ef1d..e34f1be4c967490ebb1ce8a3253cbc25f455e661 100644 (file)
--- a/doc/manual.xml.head
+++ b/doc/manual.xml.head
@@ -9484,7 +9484,9 @@ Message-Id: headers contain a local part that is to be created in a
 unique fashion. In order to do so, Mutt will <quote>leak</quote> some
 information to the outside world when sending messages: the generation
 of this header includes a step counter which is increased (and rotated)
-with every message sent. In a longer running mutt session, others can
+with every message sent. Other parts include the date, time, PID of mutt,
+and <link linkend="hostname">$hostname</link>.
+In a longer running mutt session, others can
 make assumptions about your mailing habits depending on the number of
 messages sent. If this is not desired, the header can be manually
 provided using <link linkend="edit-headers">$edit_headers</link> (though