Add option to deliver all mails to one address. Useful in staging environment.

mail_delivery_catchall.rb

# Add option to deliver all mails to one address. Useful in staging environment.
# config.action_mailer.delivery_method = :catchall

module ActionMailer 
  class Base 
    def perform_delivery_catchall(mail)
      original_to   = mail.to 
      
      mail.to       = "youremail@yourdomain"
      mail.cc       = "" 
      mail.bcc      = ""
      mail.subject  = "#{mail.subject} / Original To: #{original_to}"
      
      Rails.logger.info "Mail delivery catchall: #{original_to} => #{mail.to}"
      
      perform_delivery_sendmail(mail) 
    end 
  end 
end