diff --git a/addons/mail/static/src/components/message/message.scss b/addons/mail/static/src/components/message/message.scss
index 49f2ff13165..b2a1f6fa485 100644
--- a/addons/mail/static/src/components/message/message.scss
+++ b/addons/mail/static/src/components/message/message.scss
@@ -21,6 +21,12 @@
         // may impact the bullet point (at least it does on Safari).
         max-width: 100%;
         overflow-x: auto;
+
+        // overflow: auto can break rendering of next element of a frequent broken Outlook 365
+        // warning table. If detected, we prevent the issue by removing flotation.
+        &table[align="left"][width="100%"] {
+            float: none;
+        }
     }
 
     img {