如何配置ActionMailer以在开发模式下有条件地发送电子邮件？

Question

I have ActionMailer configured to send emails through gmail in development mode.

config/development.rb

config.action_mailer.default_url_options = { host: ENV["MY_DOMAIN"] }
config.action_mailer.raise_delivery_errors = true
config.action_mailer.delivery_method = :smtp
config.action_mailer.perform_deliveries = true
config.action_mailer.smtp_settings = {
  address: "smtp.gmail.com",
  port: 587,
  domain: ENV["MY_DOMAIN"],
  authentication: "plain",
  enable_starttls_auto: true,
  user_name: ENV["MY_USERNAME"],
  password: ENV["MY_PASSWORD"]
}

I have this set up so my designer can trigger and send test html emails to a designated address for testing in a variety of browsers / devices.

However, in development mode, I'd like to block all outgoing emails that are not being sent to that one designated email address.

I'm looking for something like:

config.action_mailer.perform_deliveries = target_is_designated_email_address?

... but I need someway to inspect the Mail instance, to ensure that it's being sent to the correct address.

any ideas?

thanks!

Answer 1

Check out the Mail interceptors in the mail gem that ActionMailer uses. You can find out more about them in this railscast on ActionMailer .

The relevant part straight from the railscast:

Create a class to redirect mail.

class DevelopmentMailInterceptor
  def self.delivering_email(message)
    message.subject = "[#{message.to}] #{message.subject}"
    message.to = "eifion@asciicasts.com"
  end
end

Register the interceptor in development mode only:

Mail.register_interceptor(DevelopmentMailInterceptor) if Rails.env.development?

Then it will just replace the subject line with "[youremail@blahbalh.com] Some subject" and redirect the message to whomever you want.