---
title: 'release notes 2020-11-18'
date: 2020-11-18
releaseType:
  - api
---

## API Key and 2FA Requirements Enforced for Free Users

In order to enhance security for all of our users, Twilio SendGrid now requires customers on free plans to use API Key authentication on all API requests and SMTP configurations. Customers must also enable Two-Factor Authentication (2FA) for all users, subusers and teammates. Visit our docs for more information on [Upgrading to API Keys]({{root_url}}/for-developers/sending-email/upgrade-your-authentication-method-to-api-keys/) and [Enabling Two-Factor Authentication]({{root_url}}/ui/account-and-settings/two-factor-authentication/).

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