When is a good time to start putting together your testing plan?

Developing your testing plan during the email blueprint stage ensures that testing is integrated from the ground up, rather than being an afterthought. This proactive approach allows you to define testing objectives, identify key elements to test (e.g., content, links, personalization, rendering across devices), and allocate resources effectively before content creation even begins. This early planning helps prevent issues, saves time, and improves the overall quality and effectiveness of your email campaigns. Waiting until a post-send analysis is too late to plan testing for that specific email. A Quality Assurance check is part of the testing process, not the planning of it. Discovering and de-risking deliverability issues is a specific type of testing or troubleshooting, not the comprehensive planning of all testing.