As the year draws to a close, email marketers are looking ahead, eager to make the next year their most successful yet. But a winning 2026 strategy doesn’t just appear out of thin air; it’s built on a solid foundation of data and insights from the year gone by. In a recent Mailjet Email Academy webinar, in-house experts Natalie Lynch (Principal Product Manager) and Julia Murljacic (Senior Email Marketing Manager) broke down the cyclical process of turning 2025 performance data into a…