I am making a simple html file as an email footer - name, company, phone and a logo so very simple. Images in emails are a pia ime because some programs decline to load them and some present them as attachments offering to save them . So a small jpeg of a logo, is there a way of pasting it into the file directly as text, not using src="filesomewhere" ?

Use this:

https://base64.guru/converter/encode/image

And add it like this:

https://stackoverflow.com/questions/9110091/base64-encoded-images-in-email-signatures

But it's still pretty flaky and can still get rejected or removed.

Far better to leave it out.

And make sure your signature doesn't get attached to all replies as this is a complete pain in the backside.

Thanks. I knew there was a way.

And yes, what a muddle!

Should anyone come bye here looking for an answer an easy method is to compose an email in thunderbird, inserting the image and using a table for layout. Then save as an html file and use that html file as a footer. A bit clunky but it will write you the strange arcane html that is apparently required here as well as inluding an image encoded as text within the html.