Supported browsers

While we make our best effort to ensure that Fastmail can be accessed on older versions of browsers wherever possible, we can only provide support for the latest versions.

We highly recommend for your security that, whatever browser you use, you set it to automatically update to the latest version. Using older software, including older browsers, can be a security risk for your computer.

We support the latest versions of:

  • Chrome
  • Firefox
  • Microsoft Edge
  • Opera
  • Safari
  • Brave
  • Vivaldi.

You may still be able to use Fastmail successfully on an unsupported browser if it supports the web technologies we use. However, we cannot guarantee functionality, and we are unable to provide support with issues related to or caused by an unsupported browser.

To use our web interface, you must have:

Cookies are small snippets of information stored on your computer and sent back to our server with each request. Like all sites, we use these as part of our system for signing in securely. Our site does not have any ads: the only cookies set are from us and we do not use cookies for any other purpose other than authentication.

On mobile

We support Safari on iOS and Chrome on Android.

Known issue: Fastmail blocked on iOS 16.4

Users on iOS 16.4 with Screen Time content restrictions enabled have reported a white screen when accessing Fastmail via the mobile app or browser on their mobile devices. This issue is due to a bug Apple introduced in the iOS 16.4 update.

Apple has fixed this issue in the iOS 16.5 release, so updating your device will allow you to access Fastmail again. If you are unable to update, a workaround is to disable Screen Time or Content & Privacy Restrictions.

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