ActionMailer::Base.smtp_settings = { :user_name => 'apikey', # This is the string literal 'apikey', NOT the ID of your API key :password => '<SENDGRID_API_KEY>', # This is the secret sendgrid API key which was issued during API key creation :domain => 'yourdomain.com', :address => 'smtp.sendgrid.net', :port => 587, :authentication => :plain, :enable_starttls_auto => true
}