In this tutorial you will find all the information to install and manage a webmail service with Roundcube, email client written in PHP and based on Ajax technology.
CentOS Mail Server RoundCube
Pursuant to EU Directive 2013/11 and Regulation EU 524/2013, if you are a consumer residing in Europe, you can use the ODR platform, available at following link, to submit a request to resolve disputes relating to contractual obligations out of court.