Thunderbird HTML signature issues

If you try to use HTML to create a signature for you email, see

There are three issues.

1. local image

you cannot just say

<img src="wfusignature.gif" ...

it will fail when attaching the image

you need to specify the full URL, like

<img src="file:///C:/myemail/thunderbird/mail/signature/wfusignature.gif" ...

2. http image

there are some http URL that will make it file also


<img src="" ...

won't work, it will stuck at the attaching phrase like not fully specified local file

something like

<img src="" ...

would work fine.

3. encoded image

some people don't want the image to be attached inline like

... <img src="">
Content-Type: image/gif;
Content-Transfer-Encoding: base64
Content-ID: <>
Content-Disposition: inline; filename="wfusignature.gif"
R0lGODlhk ...

and try the trick of

<img src="data:application/octet-stream;base64,R0lGODlhkAAsANUAACMfID...

that would send, but it won't encode the image, it treated the string as filenames.