spark post rails 550 5.7.1未配置的发送域<example.com>

Question

我在heroku上运行它。我已经使用sparkpost验证了域。它说准备发送。我将实际网址更改为“示例”。

mailers / order_mailer.rb

class OrderMailer < ActionMailer::Base
  default from: "orders@example.com"

  def new_order(order)
    @order = order
    mail(to: @order.user.email, subject: 'Order Created!')
  end
end

config / environments / production.rb

config.action_mailer.delivery_method = :smtp
  config.action_mailer.smtp_settings = {
    address:        ENV['SPARKPOST_SMTP_HOST'],
    port:           ENV['SPARKPOST_SMTP_PORT'],
    user_name:      ENV['SPARKPOST_SMTP_USERNAME'],
    password:       ENV['SPARKPOST_SMTP_PASSWORD'],
    domain:         'example.com',
    authentication: :plain
  }
  config.action_mailer.default_url_options = {
    :host => 'example.com'
  }

错误

2018-10-10T02:01:02.371812+00:00 app[web.1]: [3054201e-f06a-4acd-bff8-58947353fb72] Net::SMTPFatalError (550 5.7.1 Unconfigured Sending Domain <example.com>

我想不出什么了，但是如果您有任何需要，请告诉我。