diff --git a/addons/mail/static/src/components/messaging_menu/messaging_menu.scss b/addons/mail/static/src/components/messaging_menu/messaging_menu.scss
index 776d6af5371..7d5d4466684 100644
--- a/addons/mail/static/src/components/messaging_menu/messaging_menu.scss
+++ b/addons/mail/static/src/components/messaging_menu/messaging_menu.scss
@@ -14,6 +14,11 @@
     padding-top: 0;
     padding-bottom: 0;
     overflow-y: auto;
+    /**
+     * Override from bootstrap .dropdown-menu to fix top alignment with other
+     * systray menu.
+     */
+    margin-top: map-get($spacers, 0);
 
     &.o-messaging-not-initialized {
         align-items: center;