Email Warmup

Email warmup is arguably the most important step in cold email infrastructure setup. When you create a new email account or domain, it has zero sender reputation. If you immediately start sending hundreds of cold emails, providers will flag you as spam. Warmup tools solve this by automatically sending and receiving emails between your account and a network of real inboxes. These interactions (opens, replies, marking as important, moving from spam to inbox) send positive signals to email providers like Gmail and Outlook. A typical warmup schedule starts with 5-10 emails per day in week 1, gradually increasing to 30-50 per day by week 4. The exact ramp depends on your domain age, provider, and warmup tool. Best practices: start warmup 2-4 weeks before sending campaigns, keep warmup running even during campaigns, use a dedicated warmup tool or one built into your sending platform, and monitor your inbox placement rates throughout.