How to make a logo in an e-mail signature without HTML?

Question

ASCII

I use Thunderburd with EnigMail. Everything works fine, but only letters without HTML are supported. Thus, the logo of the employer disappears in my signed EDS letters.
What can you think of? I was already going to pseudo-graphics, but it is not very simple and in this way it turns out to be obscenely huge

Answer 1

It is logical that without HTML it is impossible in any way.