diff --git a/module/mail/js/browse.ui.js b/module/mail/js/browse.ui.js
index d48341f30c..780bee68eb 100644
--- a/module/mail/js/browse.ui.js
+++ b/module/mail/js/browse.ui.js
@@ -21,7 +21,7 @@ window.renderCell = function(result, info)
         const mail = info.row.data;
         if(!mail.failReason?.length) return result;
 
-        let failReason = mail.failReason.replaceAll('<br />', '');
+        let failReason = mail.failReason?.replaceAll('<br />', '') ?? '';
         let html = "<span title='" + failReason + "'>" + failReason.replaceAll("\n", '') + "</span> ";
         return [{html: html}];
     }