Objective

Growth Engine X (GEX) Deliverability Guide by Eric Nowoslawski and his team details a capacity‑first, replace‑not‑repair approach to outbound email infrastructure, emphasizing over‑provisioning, continuous health signals, and rapid hot‑swaps. The guide specifies initial provisioning for 5,000 emails/day with 1.5× headroom and a warmed backup pool (~50% of ADV), typically starting at 500–1,500/day while inboxes age. Domains are sourced primarily from Porkbun and Dynadot, inboxes are provisioned via Hypertide for Outlook/Azure aliases and via Google suppliers, and Smartlead is the sending platform of record (with Instantly used selectively); operational data is consolidated in Supabase.

Monitoring centers on reply rate, inbox reputation, and bounces: pull any inbox <98% reputation, cancel/reorder domains showing >2% bounces on valid addresses or <1% replies/bottom‑decile performance, and act on Hypertide domain events (e.g., ≥10/50 aliases <98%). To maintain throughput, campaigns dedicate domains, enforce 60m/63m pacing, stay below 1,500 Hypertide inboxes per campaign, and estimate ~150/day per domain at 3 sends/alias. For hard‑to‑reach providers such as Outlook, the guide recommends broad launch, then temporarily biasing to Gmail if needed, extended aging (4–8+ weeks), and gradual re‑introduction; seed‑list spam tests are de‑emphasized in favor of direct performance signals.

Subjective

Contexts

• #cold-emailing

• #email-deliverability

• #eric-nowoslawski (See: Eric Nowoslawski)

• #growth-engine-x (See: Growth Engine X)