Adobe Fonts or Typekit Fonts don't work on Apple Mail signature

[sergiom2025541]

Hi!
I tried to add a typography to my apple mail signature in all the different ways that shows the manual : Typekit Help | Using web fonts in HTML email or newsletters

None of them worked, but at least with the @Import method I can se the special font in my new mail when i'm writting it, the problem is when a person receives it, it shows all the text in the "emergency font", in my case I chose Helvetica, like this:

This is when I'm writting the mail: (it looks how it should)

What can I do?

Thanks.