Indicates whether to enable the automated IP warm-up process. Values are true (enable warmup) or false (disable warmup).When enabled, the warmup logic assigns the appropriate plan based on engagement, bounce behavior, and unsubscribes. The delivery engine increases send volumes gradually using ISP feedback and performance signals to reduce throttling and spam-filtering risk. Netcore manages the full warmup process. Approved volume is sent through the assigned dedicated IP pool, and any excess volume is routed through the Netcore or client shared pool.