Add a signature in ThunderBird: to reply, with image

Signatures allow users to include the information to be sent with every email, including name, contact details or a quote. Colored signatures are particularly helpful when the mailbox is configured to send automated replies or messages.

To add a signature under Thunderbird, use the mail settings tab. Thunderbird allows you to set a signature automatically added at the end of every email you send. Note: It is possible to add an automatic signature under Thunderbird e-mail. The information that forms the signature must be put into a file and saved in HTML format to be viewed properly in an internet browser.

How to create your signature in Thunderbird?

Right-click on your desktop and select New Content > Text Document that you will save in HTML format (e.g. C:\Program Files\Mozilla thunderbird\Signature.txt)

How to add a signature in Thunderbird?

In Thunderbird, select Tools > Account Settings.
In the left pane, select the account for which you want to use the signature.
Then, in the right pane, check the Attach this signature.
Finally, specify the path to the text file containing the signature.
Confirm by clicking on OK.

How to add an image to your signature in Thunderbird?

Create a new message in Thunderbird using HTML formatting.
Compose your new signature and place the cursor on a new line.
Then, click on Insert > Image and add a picture you'd like to use in your signature. Resize the image if needed.
Next, select File > Save As > File. Make sure it is saved in HTML format.
Close the message you drafted and go to Tools > Account Settings.
Select the email you'd like to set your new signature for, go to the bottom of the Account Settings menu, and choose the Attach the signature from a file instead (text, HTML, or image) check box. Click on Choose and select the HTML file you saved earlier.
Save the changes, and from now on you'll have your new signature with an image attached to all your emails sent from this account.