How to Add an Image to My Email Signature in Thunderbird

by Kevin Lee
Jupiterimages/Pixland/Getty Images

You don’t have to be an HTML expert to send rich, compelling email messages that command attention. Like Outlook, Mozilla’s Thunderbird email client gives you the ability to use HTML to add formatted text and graphic to email messages. You also have the option to create HTML signature files that Thunderbird can use to embed a custom signature you create. Custom signatures may consist of text, images from your hard drive or pictures that reside on the Web.

Step 1

Launch Thunderbird and create a new message.

Step 2

Click "Options," click "Format" and then click "Rich Text (HTML) Only." Click "Insert," and select "Image" to view the Image Properties window.

Step 3

Click "Choose File" to display your computer's files and folders. Double-click the image you would like to use as your signature, and then click "OK." Thunderbird displays it in the composition editor. Type optional text above or below the image if you'd like that to appear in the signature as well.

Step 4

Click "File" followed by "Save As," and then select "File." Type a name you'd like to call the file in the "File Name" text box, and click "Save."

Step 5

Click “Tools,” select “Account Settings” and click the account name you’d like to manage. Put a check mark in "Attach the Signature from a File," and click "Choose" to display a file selection window.

Find the file you saved and double-click it. Click "OK" to save your changes. Thunderbird will begin inserting your image signature in all new messages you create.


  • If your Thunderbird does not have a Menu bar, click the "Application Menu" icon, hold your mouse pointer over "Options" and then select "Account Settings" to view the Account Settings window.
  • Instead of embedding a picture from your hard drive, you can use one that resides on the Web as your signature. Do that by clicking the "Link" tab in the Image Properties window and typing the URL of an image on the Web. You can also click the "Dimensions" tab, click "Custom Size" and enter values in the "Width" and "Height" text boxes if you'd like to resize your image.
  • After you insert an image into the message composition editor, you will see small handles along the image's border. Click and drag those handles if you would like to resize the image manually.


Photo Credits

  • Jupiterimages/Pixland/Getty Images

About the Author

After majoring in physics, Kevin Lee began writing professionally in 1989 when, as a software developer, he also created technical articles for the Johnson Space Center. Today this urban Texas cowboy continues to crank out high-quality software as well as non-technical articles covering a multitude of diverse topics ranging from gaming to current affairs.

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