diff --git a/src/views/emails/partials/header.tpl b/src/views/emails/partials/header.tpl
index 9dfdba28cf..3f689deb3b 100644
--- a/src/views/emails/partials/header.tpl
+++ b/src/views/emails/partials/header.tpl
@@ -139,6 +139,9 @@
 
 		}
 
+        [role="presentation"] img {
+            max-width: 100%;
+        }
 	</style>
 
 	<!-- What it does: Makes background images in 72ppi Outlook render at correct size. -->