Message Privacy icon

<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48" width="24" height="24"><mask id="ipTMessagePrivacy0"><g fill="none" stroke="#fff" stroke-linecap="round" stroke-linejoin="round" stroke-width="4"><path d="M25.5 37H21l-10 5v-5H4V7h40v11"/><path fill="#555" d="M30 27h14v8H30z"/><path d="M40 27v-3a3 3 0 1 0-6 0v3M12 15h6m-6 6h12"/></g></mask><path fill="currentColor" d="M0 0h48v48H0z" mask="url(#ipTMessagePrivacy0)"/></svg>