Create mailcow.conf

nginx/snippets/mailcow.conf

@@ -0,0 +1,7 @@
+add_header Strict-Transport-Security "max-age=15768000";
+add_header X-Frame-Options SAMEORIGIN;
+add_header X-Content-Type-Options nosniff;
+add_header X-XSS-Protection "1; mode=block";
+add_header Referrer-Policy "strict-origin";
+add_header Content-Security-Policy "upgrade-insecure-requests";
+add_header Feature-policy "accelerometer 'none';ambient-light-sensor 'none'; autoplay 'none';camera 'none';encrypted-media 'self';focus-without-user-activation 'none'; geolocation 'none';gyroscope 'none';magnetometer 'none';microphone 'none';midi 'none';payment 'none';picture-in-picture 'none'; speaker 'none';sync-xhr 'none';usb '*';vr 'none'";