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Fastmail enables an extensive range of authentication solutions to keep your email safe from prying eyes. With support for WebAuthn and Yubico OTP, Fastmail enables users to use the YubiKey for the peace of mind that comes with additional security.

Serious about Security

Fastmail has built its reputation by offering highly secure login mechanisms, including support for reliable, robust, and simple to use YubiKey authentication.

Trusted Providers

Trusted by users in over 150 countries today, both Fastmail and Yubico together deliver a solution to keep your email safe from unauthorized access.

Comprehensive Support

Topicbox, Fastmail’s latest group email offering, is also now YubiKey-enabled, making communicating with your teams faster, safer, and easier.

yubico verified
Yubico-verified listing

This product integration has been vetted and verified by the Yubico team. This company may or may not partner with Yubico to jointly solve customer needs.

Identify your YubiKey
  • Communications
Compatible legacy YubiKeys
  • Security Key
  • YubiKey 4
  • YubiKey 4 Nano
  • YubiKey 4C
  • YubiKey 4C Nano
  • YubiKey Edge
  • YubiKey Edge-n
  • YubiKey NEO
  • YubiKey NEO-n
  • YubiKey Nano
  • YubiKey Standard
Product overview

Since its early beginnings, Fastmail has been working to improve the email experience. Today, the company provides a suite of products to help you and your organization connect better through email. Fastmail provides a multitude of products to assist in your online communication—all of which can be secured using the YubiKey.

Security protocol support
  • FIDO2/WebAuthn
  • One Time Password - Yubico OTP
Desktop/laptop platform support
  • Linux
  • macOS
  • Microsoft Windows
Browser support
  • Google Chrome
  • Microsoft Edge
  • Mozilla Firefox
  • Opera
  • Safari

Get started

Get started using Fastmail with the YubiKey.

Interested in this service?

Visit Fastmail for more information.

Does your product support YubiKey authentication? Join the Works with YubiKey Program.