Upcoming change to webhooks: no more open events after 45 days

Postmark is changing its webhook policy, effectively removing open event webhooks after 45 days of an email being sent. The company aims to align this change with its existing content history removal policy, which also removes original email content and metadata after 45 days. This change will impact customers who rely on open event webhooks for their workflow, prompting Postmark to seek feedback from those affected.