How to Set Up Email Warm-Up

A new sending domain has no reputation. Inbox providers — Gmail, Outlook, Apple Mail — have never seen email from it before. When you immediately send a large campaign from a brand-new domain, those providers flag it as suspicious. Spam rates spike. Deliverability drops. And once your reputation is damaged, rebuilding it takes weeks.

Email warm-up is the process of building that reputation gradually before you need it. Anyone who has researched this challenge while setting up GoHighLevel or similar platforms knows the answer is always the same: slow start, consistent sending, steady growth.

What Warm-Up Actually Does

Warm-up trains inbox providers to recognize your domain as a legitimate sender. By starting small and sending to your most engaged contacts first, you build a track record of high open rates and low complaints — the signals that tell Gmail and Outlook you're worth letting through.

The Warm-Up Schedule

• Week 1: 25–50 sends per day to your most engaged contacts
• Week 2: 100–200 per day, continuing to prioritize engaged contacts
• Week 3: 300–500 per day, engagement metrics should be strong by now
• Week 4+: Scale to your full list size

Steps

Common Mistakes

• Launching a full campaign the day after connecting your domain — the most common and most damaging mistake.
• Treating warm-up as optional — it's optional until your first campaign disappears into spam.
• Sending the same email repeatedly during warm-up — vary content even during low-volume ramp-up.
• Stopping warm-up too early — consistent sending maintains the trust you've built.

Next Steps

• Why Your Emails Are Going to Spam — full breakdown of every deliverability variable
• How to Send a Broadcast Email — once your domain is warmed, this is where campaigns are built