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+<p align="center"><b>Sending Mail Messages</b></p>
+
+<p>If the box is ticked or checked then a mail message is sent to the
+ other person telling that you have added to (or started) a dialogue
+ with them. The message does <b>not</b> contain the entry, only a
+ short statement and, when appropriate, a link to where they can see
+ the dialogue itself.</p>
+
+<p>You only really need to send such mail messages if you think the other
+ person is unlikely to see your entry because of their infrequent
+ use of the course. The Participants list can tell you when they
+ were last active in the course.</p>
+