diff --git a/mail/themes/pinstripe/mail/messageHeader.css b/mail/themes/pinstripe/mail/messageHeader.css
index 58c95d2a5ae..5df84f108f7 100644
--- a/mail/themes/pinstripe/mail/messageHeader.css
+++ b/mail/themes/pinstripe/mail/messageHeader.css
@@ -74,6 +74,7 @@ descriptionitem
   margin: 1px 1px 1px 1px;
   text-decoration: underline;
   color: blue;
+  border: none !important;
 }
 
 description[selectable="true"]:focus > descriptionitem[selected="true"][current="true"]