diff --git a/apps/dav/lib/CalDAV/Schedule/IMipPlugin.php b/apps/dav/lib/CalDAV/Schedule/IMipPlugin.php
index 515072fd227bf..d1684976f4827 100644
--- a/apps/dav/lib/CalDAV/Schedule/IMipPlugin.php
+++ b/apps/dav/lib/CalDAV/Schedule/IMipPlugin.php
@@ -180,6 +180,13 @@ public function schedule(Message $iTipMessage) {
 		if ($senderName === null || empty(trim($senderName))) {
 			$senderName = $this->userManager->getDisplayName($this->userId);
 		}
+		//if sender name is empty sometimes in case of email client
+		if ($senderName === null || empty(trim($senderName))) {
+				$users = $this->userManager->getByEmail($sender);
+			if (count($users) === 1) {
+				$senderName = $users[0]->getDisplayName();
+			}
+		}
 
 		/** @var VEvent $vevent */
 		$vevent = $iTipMessage->message->VEVENT;