Maintain Initial content HTML

[CarlMenke]

I know this is most likely an issue with prose mirror and how it makes you define every schema you use in the editor, but i was wondering if anyone here has had success with this.

The problem is that I'm building an email composer, and the initial content is what ever custom email signature that user has, so it's hard to predict all the possible formats i need to account for. Any chance someone would know how i could make it get inserted exactly how it is without the styles and fonts and stuff getting stripped? A random example would be here:

This is what the original signatre html is:

<p><span style="font-family: Garamond, serif">xx,</span></p>
<p>
  <span style="font-family: Garamond, serif"><strong>Noelle K Thies</strong></span>
</p>
<p>
  <span style="font-family: Garamond, serif"
    >Owner + Lead Photographer<br /><span style="color: rgb(163, 143, 132)"
      ><a href="http://www.noellethies.co" rel="noopener noreferrer" target="_blank"
        >www.noellethies.co</a
      ></span
    ><br />217-663-1019 |&nbsp;</span
  ><span style="color: rgb(163, 143, 132)"
    ><a href="mailto:[email protected]" rel="noopener noreferrer" target="_blank"
      ><span style="font-family: Garamond, serif">[email protected]</span></a
    >&nbsp;</span
  >
</p>
<p>
  <em
    ><span style="font-family: Garamond, serif"
      ><img
        src="https://res.cloudinary.com/dubsado/image/upload/v1713899987/poz6unyjiozfe09kexyw.png"
        style="width: 147px"
        class="fr-fic fr-dib"
        data-url="https://res.cloudinary.com/dubsado/image/upload/v1713899987/poz6unyjiozfe09kexyw.png"
        data-id="poz6unyjiozfe09kexyw" /></span
  ></em>
</p>

And here is what i get from getHTML() after passing that to the initialContent:

<p><span style="font-family: Garamond, serif">xx,</span></p>
<p>Noelle K Thies</p>
<p>
  <span style="font-family: Garamond, serif">Owner + Lead Photographer </span
  ><a target="_blank" rel="noopener noreferrer" href="http://www.noellethies.co"
    ><span style="font-family: Garamond, serif">www.noellethies.co</span></a
  ><span style="font-family: Garamond, serif"> 217-663-1019 |&nbsp;</span
  ><a target="_blank" rel="noopener noreferrer" href="mailto:[email protected]"
    ><span style="font-family: Garamond, serif">[email protected]</span></a
  >
</p>
<p>
  <img
    class="fr-fic fr-dib"
    src="https://res.cloudinary.com/dubsado/image/upload/v1713899987/poz6unyjiozfe09kexyw.png"
    style="width: 147px"
  />
</p>

I understand that this may just not be possible without some serious changes but I'm hoping someone has solved a similar issue! Thanks!