---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/sendgrid/glossary/ip-warmup#article
headline: IP address warmup
description: "*Email Deliverability*. The establishment of a reputation as a legitimate email sender through the gradual and regular increase in the volume of email sent from one IP address."
url: https://www.twilio.com/docs/sendgrid/glossary/ip-warmup
inLanguage: en
dateModified: 2026-10-08T22:30:54.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# IP address warmup

*Email Deliverability*. The establishment of a [reputation][ers] as a legitimate email sender through the gradual and regular increase in the volume of email sent from one [IP address][ip]. This requires using a [dedicated IP address][dedicated-ip] instead of a shared IP address.

When evaluating you as a [trusted sender][trusted-sender], ISP [spam filters][spam-filter] look at volume as a significant factor.

## Related resources

* [Warm up IP addresses][ip-warm]
* [Warming IP addresses with the API][ip-warm-api]

[dedicated-ip]: /docs/sendgrid/ui/account-and-settings/dedicated-ip-addresses

[ip-warm]: /docs/sendgrid/concepts/reputation/warm-up-ip-addresses

[ip-warm-api]: /docs/sendgrid/api-reference/ip-warmup/start-warming-up-an-ip-address

[trusted-sender]: /docs/sendgrid/glossary/trusted-sender

[ers]: /docs/sendgrid/glossary/email-reputation-score

[spam-filter]: /docs/sendgrid/glossary/spam-filter

[ip]: /docs/sendgrid/glossary/ip-address