---
"@context": https://schema.org
"@type": TechArticle
"@id": https://www.twilio.com/docs/sendgrid/api-reference/invalid-emails-api#article
headline: Invalid Emails API
description: Use the Twilio SendGrid Invalid Emails API to retrieve and delete invalid email addresses in your suppression list, protecting your sender reputation.
url: https://www.twilio.com/docs/sendgrid/api-reference/invalid-emails-api
inLanguage: en
dateModified: 2026-07-02T17:35:39.000Z
author:
  "@type": Organization
  name: Twilio Developer Education Team
publisher:
  "@type": Organization
  name: Twilio
---

# Invalid Emails API

An invalid email occurs when you attempt to send email to an address that is formatted in a manner that does not meet internet email format standards or the email does not exist at the recipient's mail server.

Examples include addresses without the "@" sign or addresses that include certain special characters and/or spaces. This response can come from our own server or the recipient mail server.

For more information, please see our [Invalid Email documentation](/docs/sendgrid/ui/sending-email/invalid-emails/).