Every post is written by an engineer who broke and fixed the thing in production. Copy-paste-ready DNS records, warmup schedules, and subject lines we A/B tested ourselves.
The 14-step audit we run on every new account — DNS, content scoring, list hygiene, and warm-up cadence. Steal it.
Ramping a new domain from 0 to 500 sends/day without burning reputation — week-by-week schedule included.
Copy-paste DNS records for Google Workspace, Microsoft 365, Zoho and custom SMTP. Plus the DMARC report dashboard you actually need.
The 5-pass cleaner: syntax → MX → SMTP → catch-all → engagement. With CSV examples and reject-rate benchmarks.
47 tested cold-email subjects, open-rate ranges from our data, and the 6 patterns Gmail Promotions punishes hardest.
A 4-line framework, 3 follow-up cadences, and the exact CTAs converting at 8–14% reply rate for our enterprise users.
No spam, no autoresponder cadence. One engineer-written guide, every Tuesday. Unsubscribe any time.
Free forever plan — 200 email credits and 100 validator credits, no card required.