ip rotation and email inbox delivery

Hi, I want to send bulk emails (double opt-in) to my list of about 500k users. I have got Phplist and Exim installed on my dedicated server with cpanel. I am also able to send emails thru phplist currently BUT I am not sure whether they will hit recipient inbox or not so I need following work to be done : 1. The freelancer MUST be a master in system admin (linux) and MUST have ability to fix errors in Exim and interspire email marketer 2. interspire and Exim is working excellent currently, BUT its ip rotation function (to send mails via interspire) is not working properly, which needs to be fixed up. 3. The ip rotation function in Exim, and SPF records needs to be created in a way that will avoid all anti spam filters and the email MUST land in recipient inbox. Please note, My main purpose for posting this project is to send e-mails into INBOX of recipient, So, if this aim is not achieved, the project would be treated as failed. I only have ONE condition to get this work done : I will NOT give my server access to anyone at any point due to my sensitive data on server. The person will need to guide me to activate the function of ip rotation (and to create SPF records) to send bulk mails through phplist via Exim. Once the work is done, I will require 7 days to check the functionality of the system before making a payment. Payment would be done via any method you choose. I am open for all payment methods. Regards