This add-on connects the Newsletter plugin to the PostMark transactional email service, enabling users to send newsletters through a dedicated delivery platform. It is designed for site owners who need dependable email sending with detailed tracking and automated list management.

• API Token Integration: Connect by entering your PostMark API token into the add-on's settings, then run a test to confirm the setup.
• Automatic Bounce Handling: The add-on configures PostMark to send notifications for bounces, complaints, and unsubscriptions automatically, requiring no manual webhook setup.
• Turbo Send Option: Increase sending speed by enabling concurrent mail processors, which can accelerate delivery rates on capable hosting environments.
• Sender Validation Support: Works with PostMark's required process to validate your 'From' email address or domain, ensuring deliverability.
• Delivery Rate Control: Respects the maximum emails per hour limit set in the Newsletter plugin's main settings, preventing service overuse.