Need to install LATEST Qmail or QmailToaster with the following:
Turn src. into SRC.RPM enabling all possible features to later rebuild on any RHLE distro 64bit (centos 6 preferable).
Enable procedures and mechanism to setup authentication login for POP/IMAP/SMTP.
Secure system/installation to avoid openrelays and any security breach.
Enable SPF, SRS, DomainKeys, DKIM and DMARC (last one if possible) to SINGOUT all sent emails.
IP Rotation system to achieve:
Given sequence rotation
Mechanism to choose wether sendmail works in direct mode (sends emails as its feeded) or QUEUE ONLY mode (it only queues emails until each X minutes it is called from cron, processes an amount of the queue and so on. So no excesive mail throttle is reached).
Rotation must be native and not use iptables.
Detalied instructions on how to replicate every step in detalied and a SCRIPT to do automatically do this is REQUIRED.