How to add an HTML email signature in Mozilla Thunderbird

Set up email signature Thunderbird Blog image

Plum Systems will most likely have designed you an HTML signature or email Footer for your email. If not be sure to contact us for help with that.
In this article, you can learn about three methods on how to set up an email signature in Mozilla Thunderbird. It can be achieved:

  • by using HTML code directly in Account settings,
  • by importing a previously prepared HTML file containing an email signature,
  • or simply creating the signature in the email body and then copying its code to the Thunderbird settings.

Follow the steps below to learn more about all three methods.

Method 1: Create an email signature directly in HTML editor

In order to create an email signature in Mozilla Thunderbird using HTML editor follow the steps below:

  1. Open Mozilla Thunderbird.
  2. Click on your email account name e.g. This email address is being protected from spambots. You need JavaScript enabled to view it. and then on View settings for this account option under the Accounts section.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-path2-modif-700-300x196.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-path2-modif-700-189x124.png 189w, https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-path2-modif-700-282x185.png 282w, https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-path2-modif-700-624x408.png 624w" alt="View settings for a selected email account" width="700" height="458" class="aligncenter wp-image-1567 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="View settings for a selected email account" decoding="async" />
  3. In the Account settings window go to the Signature text section.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-modif-276x300.png 276w, https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-modif-114x124.png 114w, https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-modif-170x185.png 170w, https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-modif-624x676.png 624w" alt="The signature text section in Account settings" width="646" height="700" class="aligncenter wp-image-1568 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="The signature text section in Account settings" decoding="async" />
  4. In order to use HTML code you need to check the Use HTML box.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/use-html-modif1-300x115.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/use-html-modif1-200x76.png 200w" alt="Check the Use HTML box to create a mail signature in HTML code" width="420" height="161" class="aligncenter wp-image-1570 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Check the Use HTML box to create a mail signature in HTML code" loading="lazy" decoding="async" />
  5. Now you can create a signature directly in the Signature text field by typing in HTML code.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/html-text-modif-277x300.png 277w, https://www.mail-signatures.com/wp-content/uploads/2015/08/html-text-modif-114x124.png 114w, https://www.mail-signatures.com/wp-content/uploads/2015/08/html-text-modif-170x185.png 170w, https://www.mail-signatures.com/wp-content/uploads/2015/08/html-text-modif-624x675.png 624w" alt="Type in HTML code in the Signature text section to create an email signature" width="646" height="699" class="aligncenter wp-image-1572 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Type in HTML code in the Signature text section to create an email signature" loading="lazy" decoding="async" />
  6. When the HTML code of your signature is ready, click OK.
  7. Now, go to the main view of Thunderbird and click Write to create a new email message.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/write-a-new-message-modif-300x109.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/write-a-new-message-modif-200x73.png 200w" alt="Click the Write button in the main Thunderbird view" width="550" height="201" class="aligncenter wp-image-1574 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Click the Write button in the main Thunderbird view" loading="lazy" decoding="async" />
  8. Your new email signature should be already there.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-300x222.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-167x124.png 167w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-250x185.png 250w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-624x461.png 624w" alt="Newly created signature available in the new email message" width="700" height="518" class="aligncenter wp-image-1576 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Newly created signature available in the new email message" loading="lazy" decoding="async" />

Method 2: Import a file (HTML, text or image) containing your email signature

In order to follow these steps, you need to create a file containing your email signature. The file can be HTML, text or image type. If you do not have one or do not want to prepare the file by yourself, you can download one of our ready-made signature templates.  When the file is ready, follow the steps below to insert it into the Thunderbird email client.

  1. Open Mozilla Thunderbird.
  2. Go to Account Settings. You can access them as described in step 2 of previous method or open Thunderbird menu, then click Options and Account Settings.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-path-modif-700-300x112.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-path-modif-700-200x74.png 200w, https://www.mail-signatures.com/wp-content/uploads/2015/08/Account-settings-path-modif-700-624x233.png 624w" alt="See how to access Account settings in Mozilla Thunderbird" width="700" height="262" class="aligncenter wp-image-1577 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="See how to access Account settings in Mozilla Thunderbird" loading="lazy" decoding="async" />
  3. Check the Attach the signature from a file instead (text, HTML, or image) box and then select a file containing your email signature by clicking the Choose… button.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/attach-a-file-modif-276x300.png 276w, https://www.mail-signatures.com/wp-content/uploads/2015/08/attach-a-file-modif-114x124.png 114w, https://www.mail-signatures.com/wp-content/uploads/2015/08/attach-a-file-modif-170x185.png 170w, https://www.mail-signatures.com/wp-content/uploads/2015/08/attach-a-file-modif-624x677.png 624w" alt="Attach a file containg your email signature " width="642" height="697" class="aligncenter wp-image-1578 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Attach a file containg your email signature " loading="lazy" decoding="async" />
  4. Select the HTML file with your email signature and click the Open button to insert it into your account.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/my-signature-in-html-modif-700-300x150.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/my-signature-in-html-modif-700-200x100.png 200w, https://www.mail-signatures.com/wp-content/uploads/2015/08/my-signature-in-html-modif-700-624x312.png 624w" alt="Insert a file with the mail signature from a folder on your computer" width="700" height="351" class="aligncenter wp-image-1579 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Insert a file with the mail signature from a folder on your computer" loading="lazy" decoding="async" />
  5. Once the file has been attached, click OK.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/attached-file-OK-modif-300x187.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/attached-file-OK-modif-197x124.png 197w, https://www.mail-signatures.com/wp-content/uploads/2015/08/attached-file-OK-modif-295x185.png 295w" alt="Click OK when the file is inserted to Thunderbird." width="431" height="270" class="aligncenter wp-image-1580 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Click OK when the file is inserted to Thunderbird." loading="lazy" decoding="async" />
  6. Your signature should be already available in every new email message. To check that, go to the main view of Thunderbird and click the Write button to see the result.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-300x222.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-167x124.png 167w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-250x185.png 250w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-624x461.png 624w" alt="Now you can see your email signature in new message body." width="700" height="518" class="aligncenter wp-image-1576 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Now you can see your email signature in new message body." loading="lazy" decoding="async" />

Method 3: Create an email signature in the body of a new message

You can also design your email signature in the new message body by using available formatting tools. Thanks to this method, you can see the result right away and modify any part of the signature if necessary. Learn more on how to achieve that by following the steps below:

  1. Open Mozilla Thunderbird.
  2. Go to the top menu and open a new message by clicking the Write button.
  3. In the new message window, you can compose your email signature using a basic toolbar or, to adjust it to your needs, you can use available formatting options under the Insert and Format tabs as well.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/new-message-empty-modif-700-300x221.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-message-empty-modif-700-167x124.png 167w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-message-empty-modif-700-250x185.png 250w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-message-empty-modif-700-624x460.png 624w" alt="Compose your email signature directly in a new message body using available tools. " width="700" height="517" class="aligncenter wp-image-1582 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Compose your email signature directly in a new message body using available tools. " loading="lazy" decoding="async" />
  4. Once the signature is composed, select all in the email body. You can do that by pressing the combination of Crtl+A on the keyboard or going to the Edit tab and then clicking the Select All option.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/signature-highlited-modif-150x150.png 150w, https://www.mail-signatures.com/wp-content/uploads/2015/08/signature-highlited-modif-300x298.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/signature-highlited-modif-124x124.png 124w, https://www.mail-signatures.com/wp-content/uploads/2015/08/signature-highlited-modif-186x185.png 186w, https://www.mail-signatures.com/wp-content/uploads/2015/08/signature-highlited-modif-624x620.png 624w" alt="Select all what you created in the message body." width="700" height="696" class="aligncenter wp-image-1583 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Select all what you created in the message body." loading="lazy" decoding="async" />
  5. Once the whole signature has been selected, go to the Insert tab and then click the HTML… option.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/insert-html...-modif-300x120.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/insert-html...-modif-200x80.png 200w, https://www.mail-signatures.com/wp-content/uploads/2015/08/insert-html...-modif-624x249.png 624w" alt="Go to the Insert tab and then the HTML section to see the HTML code of your signature. " width="700" height="280" class="aligncenter wp-image-1584 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Go to the Insert tab and then the HTML section to see the HTML code of your signature. " loading="lazy" decoding="async" />
  6. In a new pop-up window, you should see your signature in form of HTML code. Copy this text and click Cancel as we do not want it to be inserted at this moment.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/raw-html-highlighted-modif-300x292.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/raw-html-highlighted-modif-127x124.png 127w, https://www.mail-signatures.com/wp-content/uploads/2015/08/raw-html-highlighted-modif-189x185.png 189w" alt="Copy the HTML code of your mail signature. " width="394" height="384" class="aligncenter wp-image-1585 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Copy the HTML code of your mail signature. " loading="lazy" decoding="async" />
  7. Now go to the Account settings. (to see a more detailed instruction on how to access them, please refer to step 2 in the previous method).
  8. In the Account settings window, you need to paste the copied HTML code into the Signature text section. Please make sure that the Use HTML box is checked.

    Note: Instead of composing your email signature in the email body, you can use this email signature generator, which really simplifies the process. When you have finished creating the signature, copy the HTML code from the signature generator and paste it into the Signature text section in Thunderbird.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/paste-raw-html-modif-278x300.png 278w, https://www.mail-signatures.com/wp-content/uploads/2015/08/paste-raw-html-modif-115x124.png 115w, https://www.mail-signatures.com/wp-content/uploads/2015/08/paste-raw-html-modif-171x185.png 171w, https://www.mail-signatures.com/wp-content/uploads/2015/08/paste-raw-html-modif-624x672.png 624w" alt="Paste the copied HTML code into the Signature text section in Account settings. " width="647" height="697" class="aligncenter wp-image-1586 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Paste the copied HTML code into the Signature text section in Account settings. " loading="lazy" decoding="async" />
  9. Click OK to save changes.
  10. Go to the main Thunderbird view and click the Write option to open a new message. Your email signature will be there.
    https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-300x222.png 300w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-167x124.png 167w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-250x185.png 250w, https://www.mail-signatures.com/wp-content/uploads/2015/08/new-email-sig-modif-700-624x461.png 624w" alt="Your emaill signature already available in the new message." width="700" height="518" class="aligncenter wp-image-1576 size-full" style="height: auto; max-width: 100%; margin: 20px auto; padding: 0px; border: 0px; font-size: 15px; vertical-align: baseline; clear: both; display: block; border-radius: 3px; box-shadow: rgba(0, 0, 0, 0.2) 0px 1px 4px;" title="Your emaill signature already available in the new message." loading="lazy" decoding="async" />

From now on, you do not need to worry about creating a good-looking signature every time you want to send an email as your email signature is already inserted into the message body.

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