$ heroku run rake db:migrate
Running `rake db:migrate` attached to terminal... up, run.8747
DEPRECATION WARNING: Support for Rails < 4.1.0 will be dropped. (called from <top (required)> at /app/vendor/bundle/ruby/2.0.0/bundler/gems/activeadmin-0b4b22871fd3/lib/active_admin.rb:8)
Migrating to DeviseCreateAdminUsers (20131123085427)
==  DeviseCreateAdminUsers: migrating =========================================
-- create_table(:admin_users)
   -> 0.0361s
-- add_index(:admin_users, :email, {:unique=>true})
   -> 0.0188s
-- add_index(:admin_users, :reset_password_token, {:unique=>true})
   -> 0.0146s
==  DeviseCreateAdminUsers: migrated (0.0715s) ================================

  Rendered vendor/bundle/ruby/2.0.0/gems/devise-3.5.1/app/views/devise/mailer/reset_password_instructions.html.erb (1.3ms)

Sent mail to new@email.com (565.7ms)
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

534-5.7.14 <https://accounts.google.com/ContinueSignIn?sarp=1&scc=1&plt=AKgnsbv2L
/app/vendor/bundle/ruby/2.0.0/gems/mail-2.5.4/lib/mail/network/delivery_methods/smtp.rb:112:in `deliver!'
/app/vendor/bundle/ruby/2.0.0/gems/mail-2.5.4/lib/mail/message.rb:2129:in `do_delivery'
/app/vendor/bundle/ruby/2.0.0/gems/mail-2.5.4/lib/mail/message.rb:232:in `block in deliver'
/app/vendor/bundle/ruby/2.0.0/gems/actionmailer-4.0.0/lib/action_mailer/base.rb:456:in `block in deliver_mail'
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/notifications.rb:159:in `block in instrument'
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
/app/vendor/bundle/ruby/2.0.0/gems/activesupport-4.0.0/lib/active_support/notifications.rb:159:in `instrument'
/app/vendor/bundle/ruby/2.0.0/gems/actionmailer-4.0.0/lib/action_mailer/base.rb:454:in `deliver_mail'
/...
/app/vendor/bundle/ruby/2.0.0/gems/activerecord-4.0.0/lib/active_record/railties/databases.rake:42:in `block (2 levels) in <top (required)>'

ActionMailer::Base.smtp_settings = {
  :address              => "smtp.gmail.com",
  :port                 => 587,
  :domain               => "mysite.com",
  :user_name            => "my@email.com",
  :password             => "mypassword",
  :authentication       => "plain",
  :enable_starttls_auto => true
}

ActionMailer::Base.default_url_options = { :host => 'mysite.com' }