Uses $mailFrom, and in addition there is no certificate verfification for SMTP, currently

submit.php

@@ -413,9 +413,18 @@ $file = "$resultnam.pdf";
 if ($_POST['sendmail']=='yes'){
 	$subj = "Kostenerstattungsantrag ueber".calcSum()." EUR";	
 
+
 		$mail = new PHPMailer\PHPMailer\PHPMailer();
+		$mail->SMTPOptions = array(
+		        'ssl' => array(
+			        'verify_peer' => false,
+		       		'verify_peer_name' => false,
+			        'allow_self_signed' => true
+	   		 )
+		);
+
 		$mail->IsSMTP();	
-		$mail->setFrom("noc@wikimedia.de");
+		$mail->setFrom($mailFrom);
 		$mail->Subject = $subj;
 		$mail->Body = "Kostenerstattungsantrag ...";
 		$mail->AddAddress($mailDest);