diff --git a/src/mail.js b/src/mail.js
index 403598d5d..b81ccb7fb 100644
--- a/src/mail.js
+++ b/src/mail.js
@@ -163,7 +163,7 @@ function validateDisplayName(name) {
     if (name.length >= 100) return new BoxError(BoxError.BAD_FIELD, 'mailbox display name too long');
     // technically only ":" is disallowed it seems (https://www.rfc-editor.org/rfc/rfc5322#section-2.2)
     // in https://www.rfc-editor.org/rfc/rfc2822.html, display-name is a "phrase"
-    if (/["<>)(,;\\@:]/.test(name)) return new BoxError(BoxError.BAD_FIELD, 'mailbox display name is not valid');
+    if (/["<>)(;\\@:]/.test(name)) return new BoxError(BoxError.BAD_FIELD, 'mailbox display name is not valid');
 
     return null;
 }