If you want it to be the default, click Set Default then close the identities panel. Fill in Your Name and Email Address with the name and email you want your messages to come from.Click Manage Identities…, then click Add….Click your account name in the sidebar (just above the Inbox). To use a different email address to your Fastmail username: If you wish to sync calendars, this can be done now (see below for further instructions). Thunderbird will fetch the list of your folders and start synchronizing your mail. Thunderbird will find the server settings.Ĭlick Done. (What is an app password?)Ĭlick Continue.

Password: Your Thunderbird app password.Email address: Your full Fastmail username, including the domain.Your name: Whatever name you want others to see on the email you send.If it doesn't, select Local Folders in the sidebar on the left, then under the Set up an account heading in the page that appears, click the Email link.įill in your name, email address, and app password: The Set Up an Existing Email Account dialog box will appear. If you use your normal password in Thunderbird, syncing won't work and you will see a password error. Thunderbird needs its own app password to access your information. The general setup instructions are below. You can easily add your Fastmail account to Thunderbird using the setup guide in the Settings → Import & Setup screen. The instructions and screenshots in this setup guide are for the latest version of Thunderbird, which you can download for free for Windows, macOS, or Linux.

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