diff --git a/addons/mail/static/src/xml/mail.xml b/addons/mail/static/src/xml/mail.xml
index 57545b478df..7e88e1e5bc7 100644
--- a/addons/mail/static/src/xml/mail.xml
+++ b/addons/mail/static/src/xml/mail.xml
@@ -133,7 +133,7 @@
                         <li t-if="display['show_hide']">
                             <a href="#" class="oe_mail_msg_hide_type" t-attf-data-subtype='{record.subtype}'>Hide '<t t-esc="record.subtype"/>' for this document</a>
                         </li>
-                        <li t-if="record.type == 'email'"><a href="#" t-attf-data-msg_id="{record.id}" class="oe_mail_msg_reply_by_email">Reply by email</a></li>
+                        <li t-if="record.type == 'email' &amp;&amp; ! thread.params.is_wall"><a href="#" t-attf-data-msg_id="{record.id}" class="oe_mail_msg_reply_by_email">Reply by email</a></li>
                         <li t-if="record.type == 'email'"><a href="#" class="oe_mail_msg_details">Details</a></li>
                         <li><a href="#" class="oe_mail_msg_debug">Debug data</a></li>
                     </ul>