diff --git a/package.json b/package.json
index 822de0b..67321fc 100644
--- a/package.json
+++ b/package.json
@@ -69,7 +69,7 @@
     "remark-parse": "^11.0.0",
     "resend": "^3.3.0",
     "sharp": "^0.33.3",
-    "sonner": "^1.4.41",
+    "sonner": "^1.5.0",
     "tailwind-merge": "^2.3.0",
     "tailwindcss-animate": "^1.0.7",
     "three": "^0.164.1",
diff --git a/src/components/ui/EmailForm.tsx b/src/components/ui/EmailForm.tsx
index 44c44e4..ba9acea 100644
--- a/src/components/ui/EmailForm.tsx
+++ b/src/components/ui/EmailForm.tsx
@@ -4,7 +4,7 @@ import { useState, ChangeEvent, FormEvent } from "react";
 import { Input } from "@/components/ui/input";
 import { Button } from "@/components/ui/button";
 import { Card, CardHeader, CardTitle, CardDescription, CardContent } from "@/components/ui/card";
-import { toast } from "sonner";
+import { toast} from "sonner";
 
 interface EmailFormProps {
   url: string;
@@ -37,7 +37,7 @@ export default function EmailForm({ url }: EmailFormProps) {
   };
 
   const isValidEmail = (email: string) => {
-    return /^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email);
+    return /^([A-Z0-9a-z._%+-]+@[A-Za-z0-9-]+(\.[A-Za-z]{2,63})+)@(?![-])([a-zA-Z]{2,63})(?:\.[a-zA-Z]{2,63})+$/.test(email); // updated regex to verify approved domains
   };
 
   const handleSendEmails = async () => {