---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/sendgrid/glossary/sender-authentication#article
headline: Sender authentication
description: "*Internet Security*. The process that shows ISPs that you gave your mailbox provider permission to send emails on your behalf."
url: https://www.twilio.com/docs/sendgrid/glossary/sender-authentication
inLanguage: en
dateModified: 2026-07-23T16:57:51.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# Sender authentication

*Internet Security*. The process that shows Internet service providers (ISPs) that you gave your mailbox provider permission to send emails on your behalf. To set up sender authentication, add DNS records to your hosting service.

This authentication involves both [domain authentication][domain-authentication] and [link branding][link-branding].

> \[!WARNING]
>
> You might encounter the term *whitelabel*. The term *sender authentication* replaces that term and eliminates any potential racial or cultural connotations associated with the earlier term.

## Additional resources

* [Configure link branding](/docs/sendgrid/ui/account-and-settings/how-to-set-up-link-branding/)
* [Configure domain authentication](/docs/sendgrid/ui/account-and-settings/how-to-set-up-domain-authentication/)
* [Configure reverse DNS](/docs/sendgrid/ui/account-and-settings/how-to-set-up-reverse-dns/)

[link-branding]: /docs/sendgrid/glossary/link-branding

[domain-authentication]: /docs/sendgrid/glossary/domain-authentication