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+# Email Digests
+
+Users may opt into receiving daily (sent once every 24 hours) digests of unread headlines via email.
+
+Digests are sent out by the update daemon or if running <code>update.php —feeds</code>
+manually. At most 15 messages are sent in one batch.
+
+!!! notice
+
+    [PHPMailer plugin](https://github.com/supahgreg/tt-rss-plugin-mailer-smtp) is required to send mail under Docker.
+
+
+* Digests may be customized by editing ``templates/digest_template*.txt``.
+* You can preview your digest contents in preferences.
+