I send over 2,000,000 emails per day, and I do it now using 6 servers with IEM, each one with 5 or 6 MTAs doing rotations (VPSs with Pmta 4.0 each one)
I want to improve my delivery rate to inbox, specially to gmail, yahoo and hotmail if is possible. I have almost 1 year installing several instances of Pmta 4.0 and copying a config file template that have some rules per domain (hotmail, yahoo, gmail) as max-smtp-out, max-msg-rate, max-msg-per-connection, and settings vmtas as much as IPs came with the vps server. I´m using the same domain on vmtas, just changing the hostname.
I´m wondering is there now better rules to get more inbox delivery, so I would like someone expert make us a consultory, give us some tips or give us a config file template with the best performance possible.
Please let us know your propose details, price per hour consulting, and how many hours do you need. I expect no much of course.
Thank you for your time!