diff --git a/Week05/emails_elif_gulseren.py b/Week05/emails_elif_gulseren.py
new file mode 100644
index 00000000..ec0f9832
--- /dev/null
+++ b/Week05/emails_elif_gulseren.py
@@ -0,0 +1,32 @@
+import re
+
+class Emails(list):
+    def __init__(self, emails=None):
+        if emails is None:
+            emails = []
+            
+        valid_emails = []
+        for email in emails:
+            if self.validate(email):
+                if email not in valid_emails:
+                    valid_emails.append(email)
+                    
+        super().__init__(valid_emails)
+        
+        self.data = self
+
+    def validate(self, email):
+        if not isinstance(email, str):
+            raise ValueError("Bütün e-posta adresleri metin (string) formatında olmalıdır.")
+        
+        pattern = r"^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$"
+        if not re.match(pattern, email):
+            raise ValueError(f"Geçersiz e-posta formatı: {email}")
+            
+        return True
+
+    def __repr__(self):
+        return super().__repr__()
+
+    def __str__(self):
+        return super().__str__()