---
title: "What is Email warm-up? | Chargezen"
description: "Email warm-up is growing a new sending domain or IP from small daily volumes to full volume so inbox providers learn to trust it."
url: "https://chargezen.com/glossary/email-warm-up"
lang: "en"
---

Canonical URL: https://chargezen.com/glossary/email-warm-up

# Email warm-up

Email warm-up (IP and domain warming)

Email Marketing

Email warm-up is growing a new sending domain or IP from small daily volumes to full volume so inbox providers learn to trust it.

## What is Email warm-up?

A brand-new domain that suddenly sends 50,000 emails looks like a spammer, even when it's authenticated. Warm-up means starting small, sending to your most engaged people, and raising volume as results stay healthy. **IP or domain?** Brands on a **dedicated IP** must warm the IP too. On shared IPs, the domain is what you warm. **In SmartyTap,** each sending domain moves through stages: Sandbox (up to 500 a day), Pilot (1,500), Warming (4,000) and Active (10,000 a day). If complaints pass 0.3% or bounces pass 5% over 24 hours, marketing sends pause before the damage spreads.

## Example

A store warming a new domain emails its last-60-day openers first, then adds older segments a little each week over a month.

## Why Email warm-up Matters

Skipping warm-up can send a new domain straight to spam right before the sale you set it up for.

## Email warm-up FAQ

How long does email warm-up take?

Usually a few weeks, depending on list size and engagement. Start well before a big sale.

Do I need to warm up if I switch ESPs?

Yes, if the new tool sends from a new domain or IP. Your old reputation doesn't carry over automatically.

## Explore More Terms

Browse our complete glossary of e-commerce and subscription terms.

[View Full Glossary](https://chargezen.com/glossary)