Use SendGrid for production

config/environments/production.rb

@@ -64,7 +64,20 @@ Rails.application.configure do
   # Disable delivery errors, bad email addresses will be ignored
   # config.action_mailer.raise_delivery_errors = false
   config.action_mailer.default_url_options = { host: ENV["HOST_URL"] }
-  config.delivery_method = :sendmail
+  # ActionMailer Config
+  # Setup for production - deliveries, no errors raised
+  config.action_mailer.delivery_method       = :smtp
+  config.action_mailer.perform_deliveries    = true
+  config.action_mailer.raise_delivery_errors = false
+  config.action_mailer.default :charset => "utf-8"
+  config.action_mailer.smtp_settings = {
+    :address        => 'smtp.sendgrid.net',
+    :port           => '25',
+    :authentication => :plain,
+    :user_name      => ENV['SENDGRID_USERNAME'],
+    :password       => ENV['SENDGRID_PASSWORD'],
+    :domain         => ENV['SENDGRID_DOMAIN']
+  }
 
   # Enable locale fallbacks for I18n (makes lookups for any locale fall back to
   # the I18n.default_locale when a translation cannot be found).