I tried adding a small SVG to the “Compose Message” section, but it doesn’t seem to work. Is there something special I need to do to add an inline SVG?
<html>
<body>
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448.2 216.3">
<defs>
<style>.cls-1{fill:#fff;}.cls-2{fill:#c40000;}.cls-3{fill:#2d2d2d;}</style>
</defs>
<g id="Layer_2" data-name="Layer 2">
<g id="Layer_1-2" data-name="Layer 1">
<polygon class="cls-1" points="2.4 123.7 71.6 54.5 95.6 78.5 50.5 123.7 2.4 123.7"/><path d="M71.6,55.9,94.2,78.5,50.1,122.6H4.8L71.6,55.9m0-2.8L0,124.7H50.9L97,78.6,71.6,53.1Z"/>
<polygon class="cls-2" points="311.2 53.1 286 78.3 332.4 124.7 382.8 124.7 311.2 53.1"/>
<polygon class="cls-2" points="376.6 53.1 351.4 78.3 397.8 124.7 448.2 124.7 376.6 53.1"/>
<polygon class="cls-1" points="263.5 123.7 191.5 51.7 119.5 123.7 69.3 123.7 191.5 1.4 313.8 123.7 263.5 123.7"/>
<path d="M191.5,2.8l76.9,76.9,43,43H264l-19.3-19.3L192.9,51.6l-1.4-1.4-1.4,1.4-52,52-19,19H71.7l42.7-42.7L191.5,2.8m0-2.8L113,78.5,66.9,124.6H120L139.6,105l52-52,51.8,51.8,19.8,19.8h53.1L269.9,78.2,191.5,0Z"/>
<path class="cls-3" d="M17.6,185.3v31H0V138.1H80.1v14.1H17.6v19H75.7v14.1Z"/>
<path class="cls-3" d="M185.4,216.3l-36.8-59.5L111,216.3H91.4L142,138.1h13l50.3,78.2Z"/>
<path class="cls-3" d="M233.2,216.3V138.1h71.3c22,0,28.7,7.7,28.7,23.1V194c0,14.7-6.7,22.3-28.7,22.3Zm82.4-55.1c0-7.7-2.3-9-11-9H250.8V202h53.8c8.7,0,11-1.3,11-8.3Z"/>
<path class="cls-3" d="M367.6,216.3V138.1h80.1v14.1H385.2v15.7h59.2v14.2H385.2v20h62.5v14.2Z"/>
</g>
</g>
</svg>
</body>
</html>