diff --git a/bulk_mailer_url_root_domains.txt b/bulk_mailer_url_root_domains.txt
index 36b87a4c..e80f4f41 100644
--- a/bulk_mailer_url_root_domains.txt
+++ b/bulk_mailer_url_root_domains.txt
@@ -8,3 +8,4 @@ postmarkapp.com
 rs6.net
 sendgrid.net
 spoton.com
+stonly.com