Envelope open

<svg class="bi bi-envelope-open" width="1em" height="1em" viewBox="0 0 16 16" fill="currentColor" xmlns="http://www.w3.org/2000/svg">
  <path fill-rule="evenodd" d="M8 8.917l7.757 4.654-.514.858L8 10.083.757 14.43l-.514-.858L8 8.917z"/>
  <path fill-rule="evenodd" d="M6.447 10.651L.243 6.93l.514-.858 6.204 3.723-.514.857zm9.31-3.722L9.553 10.65l-.514-.857 6.204-3.723.514.858z"/>
  <path fill-rule="evenodd" d="M15 14V5.236a1 1 0 0 0-.553-.894l-6-3a1 1 0 0 0-.894 0l-6 3A1 1 0 0 0 1 5.236V14a1 1 0 0 0 1 1h12a1 1 0 0 0 1-1zM1.106 3.447A2 2 0 0 0 0 5.237V14a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V5.236a2 2 0 0 0-1.106-1.789l-6-3a2 2 0 0 0-1.788 0l-6 3z"/>
</svg>