It will help if you post the HTML used in sig.

here is the html filelink text thanks

I believe you need to have image hosted online with an HTTP link. What you showed is on your PC.

I did it again using icloud drive and now the image doesn't show up when I compose the email.

Previously it would show up when I composed it, but wouldn't send the image.

Now I just have a box outline before I even send it.

Thanks so much for your help! I am trying to organize a national movement to give back to our front line hospital workers and I really need the logo in the email ASAP.

Please show the exact HTML and we can fix this. Not a picture, but the exact source text here of the signature component.

I'm sorry. I don't know how to do that. Truthfully, that was like 3 attempts ago and I don't know how to get back there. I've been trying to host the image file on icloud, sync, google docs. nothing seems to work. It would be so amazing if someone could talk me through this. I am VERY frustrated trying to do something so simple...

There is a terrific addon, thunderbirdhtmledit. Install that and it give a tab in compose window where you can easily see the full HTML and copy to share. I use it regularly. Install that and then copy and show your HTML on this thread. You can do this and I admire your goal.

maybe this:

name
phone
We

I pasted in the html but it converted it into text

How did you create the html file? It's advised to use the TB message composer, store the html file on the same drive where TB is installed, and store the images there, too.

https://support.mozilla.org/en-US/kb/signatures#w_signatures-stored-in-files

Here is sample of a simple sig html with just one image. I created by 1. removing default sig from within compose pane 2. entering space for whatever the message will be 3. entering basic text for sig 4. using the insert>image menu to select image 5. Using the aforementioned addon to clean up HTML 6. save as template for future use.

You'll want to play with this to get it to what you want.