Adding e-mail configuration

.env.production.sample

+# Service dependencies
 REDIS_HOST=redis
+
+# Federation
 LOCAL_DOMAIN=example.com
 LOCAL_HTTPS=true
+
+# Application secrets
 PAPERCLIP_SECRET=
 SECRET_KEY_BASE=
+
+# E-mail configuration
+SMTP_SERVER=smtp.mailgun.org
+SMTP_PORT=587
+SMTP_LOGIN=
+SMTP_PASSWORD=
+SMTP_FROM_ADDRESS=notifications@example.com

config/environments/production.rb

@@ -76,4 +76,16 @@ Rails.application.configure do
 
   # Do not dump schema after migrations.
   config.active_record.dump_schema_after_migration = false
+
+  # E-mails
+  config.action_mailer.smtp_settings = {
+    :port           => ENV['SMTP_PORT'],
+    :address        => ENV['SMTP_SERVER'],
+    :user_name      => ENV['SMTP_LOGIN'],
+    :password       => ENV['SMTP_PASSWORD'],
+    :domain         => config.x.local_domain,
+    :authentication => :plain,
+  }
+
+  config.action_mailer.delivery_method = :smtp
 end

config/initializers/devise.rb

@@ -12,7 +12,7 @@ Devise.setup do |config|
   # Configure the e-mail address which will be shown in Devise::Mailer,
   # note that it will be overwritten if you use your own mailer class
   # with default "from" parameter.
-  config.mailer_sender = 'please-change-me-at-config-initializers-devise@example.com'
+  config.mailer_sender = ENV['SMTP_FROM_ADDRESS'] || 'notifications@localhost'
 
   # Configure the class responsible to send e-mails.
   # config.mailer = 'Devise::Mailer'