Put back mailcatcher config in development.rb

config/environments/development.rb

@@ -33,15 +33,7 @@ Discourse::Application.configure do
   config.handlebars.precompile = false
 
   # we recommend you use mailcatcher https://github.com/sj26/mailcatcher
-  config.action_mailer.delivery_method = :smtp
-   config.action_mailer.smtp_settings = {
-   :address              => "smtp.mailgun.org",
-   :port                 => 587,
-   :domain               => 'domain.com',
-   :user_name            => 'postmaster@domain.com',
-   :password             => 'secretpass',
-   :authentication       => 'plain',
-   :enable_starttls_auto => true  }
+  config.action_mailer.smtp_settings = { address: "localhost", port: 1025 }
 
   config.action_mailer.raise_delivery_errors = true