Set up, audit, rescue, or pre-send-check cold-email deliverability as a guided step-by-step process. Walks the nine practices in order, domains (age, TLDs, registrar spread, SPF/DKIM/DMARC), inbox providers and daily capacities, the 70/30 warm-up pool rotation, sequencer choice and fingerprinting, email security gateways (Mimecast, Proofpoint, Barracuda) and how to route around them, inbox placement testing without open tracking, burn-detection metrics with corrective actions, deliverability-safe copywriting, and email verification. Each step is do-this, here's-why, then a checkpoint before the next. Works with any provider and sequencer. Trigger when the user mentions deliverability, spam placement, bounce rates, inbox warm-up, domain reputation, blacklists, email landing in spam, reply rates dropping, warm-up scores, security gateways, or setting up cold-email infrastructure.