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How to add a professional HTML email signature in Thunderbird?

Last Updated On: 2025-03-03

Follow these steps to add an HTML email signature in Mozilla Thunderbird:

Step 1: Copy the email signature from SignatureForEmail.com to the clipboard.

Copy signature to the clipboard

Step 2: Open Thunderbird Settings

  1. Open Mozilla Thunderbird.
  2. Click on the Menu (☰) > Account Settings. Or under the Tools menu click Account Settings.
    Account Settings Thunderbird
  3. Optionally select your email account from the left panel if you have more email accounts.

Step 3: Enable HTML Signature and Paste it

  1. Go to the Signature text section.
  2. Check "Use HTML" and Paste the signature from the clipboard.
    Check Use HTML and paste your signature from the clipboard

Step 4: Save and Test

  1. Close the Account Settings window (changes are saved automatically).
  2. Click the New Message button to compose a new email.
    A new message with the signatrure
  3. Your HTML signature should appear automatically.

Bonus: Ensure Proper Formatting

  • If the signature doesn’t display correctly, check:
    • Thunderbird settings under "Composition & Addressing" (ensure "Compose messages in HTML format" is enabled).
      Compose messages in HTML format

Now your professional HTML email signature is set up in Thunderbird!