diff --git a/Week05/emails_mehmet_balci.py b/Week05/emails_mehmet_balci.py
new file mode 100644
index 00000000..010f9c4c
--- /dev/null
+++ b/Week05/emails_mehmet_balci.py
@@ -0,0 +1,30 @@
+import re
+
+
+class Emails(list):
+
+    EMAIL_PATTERN = re.compile(r"[^@\s]+@[^@\s]+\.[^@\s]+")
+
+    def __init__(self, emails):
+        super().__init__()
+        self.validate(emails)
+        for email in emails:
+            if email not in self:  # tekrar edenleri ekleme
+                self.append(email)
+
+    @property
+    def data(self):
+        return list(self)
+
+    def validate(self, emails):
+        for email in emails:
+            if not isinstance(email, str):
+                raise ValueError(f"{email!r} is not a string")
+            if not self.EMAIL_PATTERN.fullmatch(email):
+                raise ValueError(f"{email!r} is not a valid email address")
+
+    def __repr__(self):
+        return f"Emails({list.__repr__(self)})"
+
+    def __str__(self):
+        return ", ".join(self)