Changing the Signature for your Zimbra Account in Thunderbird
Open Mozilla Thunderbird
Open the Tools menu and select 'Account Settings...'

Select the account name from the menu on the left

Enter your signature in field labeled 'Signature text:' or check the box 'Attach the signature from a file instead (text, HTML, or image):' if your signature is stored in an external file

Enter your signature in field labeled 'Signature text:'
or
Check the box 'Attach the signature from a file instead (text, HTML, or image):' if your signature is stored in an external file.
Select the 'OK' button


