The **property:** prefix searches for messages with a particular
<key>=<value> property pair. Properties are used internally by notmuch
(and extensions) to add metadata to messages. A given key can be
-present on a given message with several different values.
+present on a given message with several different values. See
+**notmuch-properties(7)** for more details.
Operators
---------
**notmuch-insert(1)**,
**notmuch-new(1)**,
**notmuch-reindex(1)**,
+**notmuch-properties(1)**,
***notmuch-reply(1)**,
**notmuch-restore(1)**,
**notmuch-search(1)**,