This is what we are looking for:
1- PMTA upgrade to version 4 with the new PMTA monitoring console.
2- Have only 1 SMTP connection and rotate from inside PMTA all our 50 IPS
3- Send 500 mails from each IP, then rotate to the next IP, and continue with the same with ALL 50 IPS.
4- Setup DKIM, SPF, SENDER SCORE, DOMAIN KEYS, REVERSE DNS.
5- We should be able to see how many mails were sent from each IP from the PMTA monitoring console.
6- Send 100.000 mails per hour / 500.000 mails per day.
7- SETUP SPF for clients, example: include:[url removed, login to view] and this to include all our IPS automatically to our clients SPF
8- create a short SPF record for client, for example include:spf_domain.com and make this pass all our ip's.
we don't want to give to our clients the real SPF with all the ip's.