diff --git a/config/environments/production.rb b/config/environments/production.rb
index 1968d0707..cddf2781f 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -69,7 +69,7 @@
 
   config.action_mailer.delivery_method = :smtp
   config.action_mailer.smtp_settings = {
-    address: "lib-ponyexpr.princeton.edu"
+    address: "lib-ponyexpr-prod.princeton.edu"
   }
 
   config.action_mailer.default_options = {