help: Add configure-missed-message-emails.

templates/zerver/help/configure-missed-message-emails.md

@@ -0,0 +1,31 @@
+# Configure missed message emails
+
+## Include organization name in subject line
+
+If you belong to multiple Zulip organizations, it can be helpful to have the
+name of the organization in the subject line of your missed message emails.
+
+{start_tabs}
+
+{settings_tab|notifications}
+
+1. Under **Other notification settings**, select
+   **Include organization name in subject of missed message emails**.
+
+{end_tabs}
+
+## Hide message content
+
+For security or compliance reasons, you may want to hide the content of your
+Zulip messages from your email. Organization admins can do this at an
+organization-wide level, but you can also do this just for the messages you
+receive.
+
+{start_tabs}
+
+{settings_tab|notifications}
+
+1. Under **Other notification settings**, toggle
+   **Include message content in missed message emails**.
+
+{end_tabs}

templates/zerver/help/include/sidebar_index.md

@@ -79,6 +79,7 @@
 * [Alert words](/help/add-an-alert-word)
 * [Notify everyone on a stream](/help/notify-everyone-on-a-stream)
 * [Disable new login emails](/help/disable-new-login-emails)
+* [Configure missed message emails](/help/configure-missed-message-emails)
 * [Troubleshoot desktop notifications](/help/troubleshooting-desktop-notifications)
 * [Test mobile notifications](/help/test-mobile-notifications)