diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index cf7a978..c146f0a 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -1,4 +1,4 @@
 class ApplicationMailer < ActionMailer::Base
-  default from: ENV.fetch("RAILS_SMTP_USERNAME", Rails.application.credentials.dig(:smtp, :user_name))
+  default from: ENV.fetch("RAILS_SMTP_USERNAME", "user@example.com")
   layout "mailer"
 end