Every send should be earned. Build behaviour-triggered flows and RFM segments before you send a single campaign, the companies compounding retention in 2026 treat their ESP as a revenue system, not a broadcast tool.
Build triggered flows before campaigns. The reliable revenue in lifecycle email comes from flows that fire on behaviour (cart abandoned, trial stalled, customer lapsing), not from broadcast campaigns, however well-written. Segment on RFM; earn every send. Not doing: weekly newsletters to the full list, time-based SaaS drips, or launching campaigns before the core 5 flows are live and instrumented.