Postmark stores email content, events (e.g. delivery, click, open), and metadata for all messages for 45 days. After 45 days, Postmark deletes email content and related metadata for all delivered messages. Postmark stores aggregated statistics forever. This includes bounce and spam complaints. For historical Bounce and Spam Complaints, they can be found under the Suppressions section of your
Postmark stores blocked inbound messages for 45 days.