---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/glossary/allow-list#article
headline: Allowlist
description: "*Internet Security*. A curated selection of domains, email addresses, or IP addresses that a service or system has granted explicit access."
url: https://www.twilio.com/docs/glossary/allow-list
inLanguage: en
dateModified: 2026-05-06T13:22:30.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# Allowlist

*Internet Security*. A curated selection of domains, email addresses, or IP addresses that a service or system has granted explicit access.

Systems, services, and apps use allowlists for access control. To attempt to access an account with an allowlist, a user must have the appropriate attributes and values. *Allowlist* had referred to a list of IP addresses allowed to send mail to a specific inbox provider. These email allowlists have fallen out of favor.