As email authentication becomes increasingly important for businesses, Postmark has introduced a new process to automatically generate stronger DKIM keys for its customers. To ensure seamless delivery of emails, the company is now upgrading and rotating DKIM keys in an effort to meet the new Gmail/Google requirements. This process allows customers to easily upgrade their keys, with no downtime or interruptions during message signing. Additionally, Postmark is advising customers to rotate their keys quarterly to comply with the DKIM standard, providing a more efficient and reliable email delivery solution.