diff --git a/doc/components.rst b/doc/components.rst
index 0374e2a9..f7235b39 100644
--- a/doc/components.rst
+++ b/doc/components.rst
@@ -946,6 +946,13 @@ To send a message, just write to the corresponding JID. Email addresses are mapp
 using `XEP-0106 (JID Escaping)`_: the email is escaped and used as the user-part of the
 gateway JID.
 
+Multicast addressing (i.e. the ``To``, ``CC`` and ``BCC`` email headers or their
+`XEP-0033`_ XMPP equivalent) are supported and will be converted from and to XMPP. Other
+metadata like ``Reply-To`` are also supported. You can use
+:ref:`libervia-cli_message_send` to specify those metadata when sending a message.
+
+
+.. _XEP-0033: https://xmpp.org/extensions/xep-0033.html
 .. _XEP-0100 (Gateway Interaction): https://xmpp.org/extensions/xep-0100.html
 .. _XEP-0106 (JID Escaping): https://xmpp.org/extensions/xep-0106.html