diff --git a/integrations/nextcloud/snappymail/js/resize.js b/integrations/nextcloud/snappymail/js/resize.js
index bacff7aa0..93a2d2741 100644
--- a/integrations/nextcloud/snappymail/js/resize.js
+++ b/integrations/nextcloud/snappymail/js/resize.js
@@ -1,18 +1,18 @@
-(()=>{
-
-	const
-		buffer = 0, //was 5 but this was creating a white space of 5px at the bottom of the page
-		ifr = document.getElementById('rliframe'),
-		pageY = elem => elem.offsetParent ? (elem.offsetTop + pageY(elem.offsetParent)) : elem.offsetTop,
-		resizeIframe = () => {
-			var height = document.documentElement.clientHeight;
-			height -= pageY(ifr) + buffer;
-			height = (height < 0) ? 0 : height;
-			ifr.style.height = height + 'px';
-		};
-	if (ifr) {
-		ifr.onload = resizeIframe;
-		window.onresize = resizeIframe;
+document.addEventListener('readystatechange', () => {
+	if (document.readyState === 'complete') {
+		const
+			buffer = 0, //was 5 but this was creating a white space of 5px at the bottom of the page
+			ifr = document.getElementById('rliframe'),
+			pageY = elem => elem.offsetParent ? (elem.offsetTop + pageY(elem.offsetParent)) : elem.offsetTop,
+			resizeIframe = () => {
+				var height = document.documentElement.clientHeight;
+				height -= pageY(ifr) + buffer;
+				height = (height < 0) ? 0 : height;
+				ifr.style.height = height + 'px';
+			};
+		if (ifr) {
+			ifr.onload = resizeIframe;
+			window.onresize = resizeIframe;
+		}
 	}
-
-})();
+});
diff --git a/integrations/nextcloud/snappymail/templates/index.php b/integrations/nextcloud/snappymail/templates/index.php
index fcdd98db2..f304654fb 100755
--- a/integrations/nextcloud/snappymail/templates/index.php
+++ b/integrations/nextcloud/snappymail/templates/index.php
@@ -1 +1,3 @@
-<iframe id="rliframe" style="border: none; width: 100%; height: 100%; position: relative;" tabindex="-1" frameborder="0" src="<?php echo $_['snappymail-iframe-url']; ?>"></iframe><?php OCP\Util::addScript('snappymail', 'resize');
+<iframe id="rliframe" style="border: none; width: 100%; min-height: 100%; position: relative;" tabindex="-1" frameborder="0" src="<?php echo $_['snappymail-iframe-url']; ?>"></iframe>
+<?php
+// OCP\Util::addScript('snappymail', 'resize');