boxicons/static/img/svg/bx-message-alt.svg

<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24"><path fill="none" d="M4 15h4a1 1 0 0 1 .781.375L12 19.399l3.219-4.024A1 1 0 0 1 16 15h4V6H4v9z"/><path d="M21 4H3a1 1 0 0 0-1 1v11a1 1 0 0 0 1 1h4.52l3.699 4.625a1 1 0 0 0 1.562 0L16.48 17H21a1 1 0 0 0 1-1V5a1 1 0 0 0-1-1zm-1 11h-4a1 1 0 0 0-.781.375L12 19.399l-3.219-4.024A1 1 0 0 0 8 15H4V6h16v9z"/></svg>