550 Cannot receive from specified address

Question

I followed all the instructions on heroku and sendgrid but users receive an error when they try to sign up. I ran the logs and here is the error. What is wrong here?

2013-07-01 app[web.1]: Net::SMTPFatalError (550 Cannot receive from specified address <[email protected]>: Unauthenticated senders not allowed

my settings;

config/initializers/devise.rb

  config.mailer_sender = "[email protected]"

config/environments/production.rb

config.action_mailer.default_url_options = { :host => '***.herokuapp.com' }
ActionMailer::Base.smtp_settings = {
  :address        => "smtp.sendgrid.net",
  :port           => "25",
  :authentication => :plain,
  :user_name      => ENV['***@heroku.com'],
  :password       => ENV['***'],
  :domain         => ENV['heroku.com']
}

Answer 1

You need to change the line where you are setting the username and password to be ENV['SENDGRID_USERNAME'] and ENV['SENDGRID_PASSWORD'], not your actual password. These values are stored on the server and should not appear in your code.