Postmark has experienced significant growth, leading to issues with its activity page and bounce hooks. The company is addressing these problems by upgrading its servers and storage methods to improve response times and reduce delays. To achieve this, they have trimmed older records from their database, which resulted in some lost history for In queue records. Postmark aims to store at least 30 days of send activity in the future, with the goal of improving performance and service enhancements. The company is nearing the completion of its migration process and plans to announce improved performance soon.