You need to install RabbitMQ: http://www.rabbitmq.com/download.html.
To install the project:
- Install composer: https://getcomposer.org/download/
- run the command:
composer.phar install
Basically, this application sends email, through a queue, and a consumer takes the message to actually send it with SwiftMailer. Based on the article of Clément Delmas: http://afsy.fr/avent/2013/21-rabbitmq-et-Symfony2-traitements-asynchrones (in french)
Feel free to play with it!