Email Piping adds ability to import emails directly to your ticket system so that client can create ticket just by sending email to your support or reply ticket by replying to email notification without need to login your site. Ex. Your customer created ticket on your website. You replied the ticket and notification will sent to customers email address. Ideally customer should come to your website and then reply to the ticket, but this rarely happen. Instead he reply directly to email notification and you simply can not control your customers. This way, you have to keep checking your inbox and chances to miss the communication are high. Email Piping add-on covers you here, it imports all your inbox emails in desired tickets.