What problem does it solve? Cold email fails when the infrastructure behind it is wrong: misconfigured MX/SPF/DKIM/DMARC records, under-sized domain and mailbox fleets, skipped warmup, and bounce spikes misread as copy problems. This Skill gives Sales Ops and GTM engineers a single operational playbook for building, verifying, and monitoring cold-email infrastructure instead of clicking through MXToolBox and spreadsheets by hand. ## Core Features & Use Cases - Executable playbooks: a DNS/auth audit (MX, SPF lookup budget, DKIM across 14 selectors, DMARC policy, drift diffing against a saved baseline, usable as a launch gate) and a sizing calculator that turns a monthly goal or deadline-driven campaign into mailbox and domain counts, reading limits live from the reference doc. - Role-tagged sub-skills: domain research and purchasing rules, mailbox provisioning, per-sequencer setup (EmailBison, Instantly, Smartlead, Lemlist), warmup and go-live, campaign routing by ESP/SEG, dashboard reading, setup audits, and blacklist/bounce root-cause analysis. - Single source of truth: all send limits, warmup floors, inbox-classification thresholds, bounce-code taxonomy, and 2026 market benchmarks live in one reference file that sub-skills cite by key. - Use Case: A client wants to send 15,000 cold emails per month. Run the sizing calculator with their Google/Microsoft mix to get mailbox and domain counts, brief the domain purchase, then run the DNS audit as a pre-launch gate before warmup starts. ## Quick Start Ask the assistant to size cold email infrastructure for a monthly sending goal and audit the DNS records of your sending domains before launch.
