First up -- Willem Stam has kindly provided the following information about Postmastery:
Postmastery Delivery Analytics (PDA) helps email service providers (ESPs), marketing agencies and other professional senders monitor delivery performance, deliverability, and reputation. The service unleashes the information hidden in mail server logs; runs at Google scale; and integrates smoothly with on-premises mail servers (PowerMTA, Postfix, Momentum etc.) and SMTP providers (SendGrid, SparkPost, Amazon SES etc.). PDA also reads data from Microsoft SNDS, Return Path Sender Score, Google Postmaster Tools (GPT) and relevant blacklists. The combined data points reveal an accurate view of your past and present delivery performance, negating the need to manually check a collection of deliverability tools.
Senders like Adestra, SugarCRM, Bluetooth SIG, MailPoet and Booking.com rely on Postmastery Delivery Analytics every day. In most cases it is combined with Postmastery’s professional email delivery consultancy.
For more information, please visit our website at: https://www.postmastery.com/delivery-analytics/