About This Site
How to Warm Up Email is a free resource built to give cold emailers a clear, data-backed guide to the most critical step in outbound sales infrastructure: email warm-up.
The answer — start at 10–20 emails per day and ramp to 50–100 over 3–4 weeks — comes from real-world warm-up data across 10,000+ domains. But the nuances matter: DNS configuration, warm-up tool selection, engagement signal quality, and provider-specific behaviors all determine whether your domain achieves 94% inbox placement or gets blacklisted in the first two weeks.
This site is maintained by the team at Sales.co, an AI-first cold email platform that has helped 271+ sales teams warm up and manage thousands of sending domains. We built this resource because warm-up is the step most teams either skip entirely or execute poorly — and both mistakes destroy campaigns before they start.
Why Trust This Data?
The benchmarks and recommendations on this site come from aggregate, anonymized warm-up data across the Sales.co platform and third-party deliverability research. We track inbox placement rates, bounce rates, and reputation scores across thousands of domains during their warm-up periods to identify the exact ramp schedules that produce the best long-term deliverability.
Contact
Questions or suggestions? Reach us at ryan@sales.co.