Mail::X::Smtpapi

Integrates support for SendGrid's X-SMTPAPI field into the Mail gem.

Please refer to SendGrid docs for ideas of what you can do with the X-SMTPAPI header!

Installation

Add this line to your application's Gemfile:

gem 'mail-x_smtpapi'

And then execute:

$ bundle

Or install it yourself as:

$ gem install mail-x_smtpapi

Usage

Write into the X-SMTPAPI header from anywhere with access to the mail object.

Example: Rails Mailer

Adapting the Rails Guide example:

class UserMailer < ActionMailer::Base

  def welcome(user)
    @user = user

    mail.smtpapi.category = 'welcome'
    mail.smtpapi.unique_args['user_id'] = @user.id

    mail(to: @user.email, subject: 'Welcome to My Awesome Site')
  end

end

Example: Mail Interceptor

Adapting the Rails Guide example:

class SandboxEmailInterceptor
  def self.delivering_email(message)
    message.smtpapi.unique_args['original'] = message.to
    message.to = ['sandbox@example.com']
  end
end

Example: Template Helper

module MailerABHelper
  def show_variant?(name)
    variant = rand(2) == 0 ? 'main' : 'alternate'
    mail.smtpapi.unique_args["#{name}_variant"] = variant
    return variant == 'alternate'
  end
end

Contributing

1. Fork it ( https://github.com/kickstarter/mail-x_smtpapi/fork )
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create a new Pull Request