nextcloud-server/core/img/actions/mail.svg

<svg xmlns="http://www.w3.org/2000/svg" version="1.1" height="16" width="16" viewBox="0 0 16 16"><path d="m0.89 3c-0.4924 0-0.89 0.4-0.89 0.89v8.2202c0 0.493 0.4 0.89 0.89 0.89h14.22c0.492 0 0.89-0.4 0.89-0.89v-8.2202c0-0.4924-0.4-0.89-0.89-0.89zm0.75 1.0278 6.0827 6.0817h0.52773l6.1102-6.0817 0.611 0.6109-3.6384 3.6934 2.75 2.8047-0.61102 0.61092-2.8052-2.8047-2.0275 2.0549h-1.2776l-2.0271-2.0553-2.8053 2.8323-0.6111-0.639 2.7774-2.8046-3.666-3.6932z"/></svg>