Whitelist Recipients

It is very simple tool to whitelist action mailer recipients, CC and BCC. This is specially helpful in staging environment, where you have replica of production environment including databases and you dont want to send mails to actual customers.

• Simple to use.
• Whitelist not only recipients but cc and bcc as well.
• Can enable/disable it in any environment.

• Ruby: > 2.3

• Rails: >= 5

Whitelist Recipients installation is simple and pretty standard.

    $ gem install whitelist_recipients

If you are using Rails and want to install through bundler, then just add this line to your Gemfile.

    gem 'whitelist_recipients'

Now generate initializer file by running following command.

    $ rails g whitelist_recipients:install

It will generate a file whitelist_recipients.rb in initializer folder. You dont have to do anything here.

    if Rails::VERSION::MAJOR > 6
        Rails.application.configure do
            config.action_mailer.interceptors = [WhitelistRecipients::MailerInterceptor]
        end
    else
        ActionMailer::Base.register_interceptor(WhitelistRecipients::MailerInterceptor)
    end

Add following information in any of require environment files.

    config.action_mailer.smtp_settings = {
      :user_name => '<username>',
      :password => "<password>",
      :domain => '<example.com>',
      :address => '<smtp.dummy.net>',
      :port => <port>,
      :whitelist_email_addresses => %w[john@example.com],    # gem property
      :whitelist_mailer_cc => %w[johnny@example.com],           # gem property
      :whitelist_mailer_bcc => %w[johnnybravo@example.com] # gem property
  }

Now your require environment will send mail to above mentioned users. if recipient has different email address in action mailer function, then e-mail wont sent to them.

• If you don't add any of the require property in smpt_settings then, environment can send mails to any user.
• If you put empty array inside whitelist_email_addresses property, it means, ActionMailer is disable, mail wont be sent to users.
• If whitelist_email_addresses has value, but whitelist_mailer_cc or whitelist_mailer_bcc are empty array. it means, cc and bcc wont send to require email addresses even if you have added value in action mailer function

	# john@example.com will receive mail (if added in whitelist_email_addresses)
    # johnny@example.com, johnnybravo@example.com will not receive any mail.

	mail(to: 'john@example.com', cc: 'johnny@example.com', bcc: 'johnnybravo@example.com')

• If you want to whitelist only cc or bcc then put property inside smtp_setting but don't put whitelist_email_addresses property. like this

    config.action_mailer.smtp_settings = {
      :user_name => '<username>',
      :password => "<password>",
      :domain => '<example.com>',
      :address => '<smtp.dummy.net>',
      :port => <port>,
      :whitelist_mailer_cc => %w[johnny@example.com],      # gem property
           # OR
      :whitelist_mailer_bcc => %w[johnnybravo@example.com] # gem property
  }

Bug reports and pull requests are welcome on GitHub at https://github.com/irfanbabar/whitelist_recipients. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the Whitelist Recipients project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.