Create signature HTML

Is it possible to insert and html signature or a link a HTML file containing one image?

@PaoloHolzl welcome to the forum.

I would not recommend doing that as all images in your signature will be sent as attachments…

Preferably, you could convert your images to inline Base64 objects here: https://www.base64-image.de/

Those images can then be placed in the “src” attribute of your “img” tag and will be displayed without need for attachments.

You can see an example for such Base64 images on this error page from TU Dresden: https://www.rn.inf.tu-dresden.de/j

Ok, with that approach a link to an external file can be prevented. But is HTML possible in K9 signatures in genaral?

Ok but is it possible insert directly html code into signature?
Do you have an example?

K-9 Mail does not support adding HTML signatures.