How to Add an Email Signature in Thunderbird (Windows)

Note: When installing your email signature in Thunderbird, you need to use the HTML source code of the email signature.

Step 1:

Once you are ready to set up your email signature, open Thunderbird. On the top right, click the Settings icon and select Account Settings.


Step 2:

On the right side paste your new or updated email signature into the Signature text field. Be sure to select “Use HTML” if it isn’t already ticked.


Step 3:

Click to close the Account Settings window and compose a new email message. Enjoy your new signature!

Note: Thunderbird will often show red borders inside and around the email signature when you compose a new email. Those borders will not be visible to your recipients, and your email signature will look normal to them.

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