MockSMTP/MailCatcher sniffer for your development.rb

development.rb

# config/environments/development.rb

require "net/smtp" # don't forget to add this first

# Try to sniff out if MockSMTP or MailCatcher is running
begin
  smtp = Net::SMTP.start "localhost", 1025
  if smtp.started?
    smtp.quit
    puts ">> Emails WILL be sent to the SMTP server on port 1025"

    config.action_mailer.default_url_options = { :host => 'localhost:3000' }
    config.action_mailer.delivery_method     = :smtp
    config.action_mailer.smtp_settings       = { :address => "localhost", :port => 1025 }
    config.action_mailer.raise_delivery_errors = true
  end
rescue Errno::ECONNREFUSED
  puts ">> Emails will be sent to STDOUT"
    config.action_mailer.raise_delivery_errors = false
end