diff --git a/launch.html b/launch.html
index 721890a..412f27f 100644
--- a/launch.html
+++ b/launch.html
@@ -428,8 +428,12 @@
        */
 
       const CONFIG = {
+        /* 
+         * Your Jitsi Launcher domain
+         */
+        jitsiLauncher: "meet.bnvb.eu",
         /*
-         * Your Jitsi Domain.
+         * Your Jitsi domain.
          */
         jitsiHost: "meet.bnvb-ingenieure.de",
         /*
@@ -532,7 +536,8 @@
             startTimeRequired: "Please select a start time",
             endTimeRequired: "Please select an end time",
             endAfterStart: "End time must be after start time",
-            organizerRequired: "Please enter an organizer email"
+            organizerRequired: "Please enter an organizer email",
+            organizerInvalid: "Please enter a valid organizer email address"
           }
         },
 
@@ -617,7 +622,8 @@
             startTimeRequired: "Bitte wähle eine Startzeit",
             endTimeRequired: "Bitte wähle eine Endzeit",
             endAfterStart: "Die Endzeit muss nach der Startzeit liegen",
-            organizerRequired: "Bitte gib eine Organisator-E-Mail ein"
+            organizerRequired: "Bitte gib eine Organisator-E-Mail ein",
+            organizerInvalid: "Bitte gib eine gültige Organisator-E-Mail-Adresse ein"
           }
         },
 
@@ -701,7 +707,8 @@
             startTimeRequired: "Veuillez sélectionner une heure de début",
             endTimeRequired: "Veuillez sélectionner une heure de fin",
             endAfterStart: "L'heure de fin doit être après l'heure de début",
-            organizerRequired: "Veuillez entrer un email d'organisateur"
+            organizerRequired: "Veuillez entrer un email d'organisateur",
+            organizerInvalid: "Veuillez entrer une adresse email d'organisateur valide"
           }
         }
       };
@@ -1180,7 +1187,7 @@
       function generateICS(meetingName, description, startTime, endTime, organizer) {
         /* Generate a unique room name from the meeting name */
         const roomName = meetingName.toLowerCase().replace(/\s+/g, '-').replace(/[^a-z0-9-]/g, '');
-        const meetingUrl = `https://${CONFIG.jitsiHost}/launch.html?room=${encodeURIComponent(roomName)}`;
+        const meetingUrl = `https://${CONFIG.jitsiLauncher}/launch.html?room=${encodeURIComponent(roomName)}`;
         
         /* Format dates for ICS */
         const formatICSDate = (date) => {
@@ -1297,6 +1304,12 @@ END:VCALENDAR`;
           return;
         }
 
+        const emailPattern = /^[^\s@]+@[^\s@]+\.[^\s@]+$/;
+        if (!emailPattern.test(organizer)) {
+          alert(getTranslation('creator.organizerInvalid') || 'Please enter a valid organizer email address');
+          return;
+        }
+
         /* Generate ICS */
         const icsData = generateICS(meetingName, description || meetingName, startTime, endTime, organizer);