Problem sending via smtp gmail(Net::SMTPServerBusy) what is it?

Question

gmail

I have the following errors:

500 Internal Server Error
Net::SMTPServerBusy - 454 4.7.1 : Relay access denied

Did according to the guide:
http://www.gotealeaf...emails-in-rails
My configuration file (development.rb)

config.action_mailer.raise_delivery_errors = true
  config.action_mailer.delivery_method = :smtp

    config.action_mailer.smtp_settings = {
        :address               =>  "smtp.gmail.com",
        :port                  =>  587,
        :user_name            => 'xxx',
        :password             => 'xxx',
        :authentication        =>  'plain',
        :enable_starttls_auto =>  true
    }

I'm posting from a local machine.
Enable less secure mode for Gmail apps to get apps working.
What could be wrong?

Answer 1

Faced a similar problem, the solution was picking in the account settings on the topic "Security and Login".
I am almost 100% sure that by changing the settings to yandex, everything will work correctly.