subvisual/firestarter

if Rails.env.staging? || Rails.env.production?
  SMTP_SETTINGS = {
    address: ENV.fetch("SMTP_ADDRESS"), # example: 'smtp.sendgrid.net'
    authentication: :plain,
    domain: ENV.fetch("SMTP_DOMAIN"), # example: 'this-app.com'
    password: ENV.fetch("SMTP_PASSWORD"),
    port: "587",
    user_name: ENV.fetch("SMTP_USERNAME"),
  }
end