Detailed How to: install and configure iredmail as a relay server (Centos7)

Hello, I need a very, very detailed how to: install and configure iredmail on centos 7 configuration should consider the following - create /manage local users - map users between local email and ISP email (user @ localdomain <----> user @ domain .mx) - every user should authenticate on the isp prior to send mail again this has to be a very detailed how to as I will test your document so i can follow it and do my own installation. once this is good funds will be released please make sure you understand what is needed prior to bidding. if you have questions please ask before you bid