NEW YORK–(BUSINESS WIRE)–Stensul, the AI governance platform for enterprise email marketing, today announced its November release, which extends governance to campaign performance. The release introduces Self-Improving Email, now in early access, which connects the performance of every email to the specific content inside it, so each new send learns from the last. The November release also makes it simpler and faster to personalize subject lines and preheaders by audience, gives new customers