Address Validator Project Enhancement: Added Comprehensive Email Validation

Address Validator/AddressValidator.py

@@ -1,16 +1,83 @@
-def addressVal(address):
-    dot = address.find(".")
-    at = address.find("@")
-    if (dot == -1):
-        print("Invalid")
-    elif (at == -1):
-        print("Invalid")
-    else:
-        print("Valid")
+import re
+import dns.resolver  
+import idna
+
+# Regular expression for basic email syntax validation
+email_regex = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
+
+def is_valid_email(email):
+    """
+    Validates an email address through multiple checks.
+
+    Args:
+        email (str): The email address to validate.
+
+    Returns:
+        bool: True if the email is valid, False otherwise.
+    """
+    # Check if the email contains '@'
+    if '@' not in email:
+        return False
+
+    # Split the email into local and domain parts
+    try:
+        local_part, domain_part = email.split('@')
+    except ValueError:
+        return False
+
+    # Check length constraints for local and domain parts
+    if len(local_part) > 64 or len(domain_part) > 255 or len(email) > 320:
+        return False
+
+    # Perform basic syntax validation
+    if not re.match(email_regex, email):
+        return False
 
-print("This program will decide if your input is a valid email address")
-while(True):
-    print("A valid email address needs an '@' symbol and a '.'")
-    x = input("Input your email address:")
+    # Validate the domain using DNS MX records
+    if not is_valid_domain(domain_part):
+        return False
 
-    addressVal(x)
+    # Validate if the domain supports internationalized domain names (IDNs)
+    if not validate_international_email(domain_part):
+        return False
+
+    return True
+
+def is_valid_domain(domain):
+    """
+    Checks if the domain has valid MX records.
+
+    Args:
+        domain (str): The domain to check.
+
+    Returns:
+        bool: True if the domain has valid MX records, False otherwise.
+    """
+    try:
+        mx_records = dns.resolver.resolve(domain, 'MX')
+        return len(mx_records) > 0
+    except Exception:
+        return False
+
+def validate_international_email(domain):
+    """
+    Validates that the domain supports internationalized domain names (IDNs).
+
+    Args:
+        domain (str): The domain to validate.
+
+    Returns:
+        bool: True if the domain supports IDNs, False otherwise.
+    """
+    try:
+        idna.encode(domain).decode('utf-8')
+        return True
+    except idna.IDNAError:
+        return False
+
+if __name__ == "__main__":
+    email_input = input("Enter your email address: ")
+    if is_valid_email(email_input):
+        print("The email address is valid.")
+    else:
+        print("The email address is invalid.")

Address Validator/README.md

@@ -1,21 +1,25 @@
 <!--Please do not remove this part-->
-![Star Badge](https://img.shields.io/static/v1?label=%F0%9F%8C%9F&message=If%20Useful&style=style=flat&color=BC4E99)
+![Star Badge](https://img.shields.io/static/v1?label=%F0%9F%8C%9F&message=If%20Useful&style=flat&color=BC4E99)
 ![Open Source Love](https://badges.frapsoft.com/os/v1/open-source.svg?v=103)
 
 # Address Validator
 
+## 🛠️ Description
 
+This program validates email addresses through multiple checks, including syntax validation,  and DNS MX record verification. It ensures that the email address contains an '@' symbol, checks for proper length constraints, and verifies that the domain is not unauthorized email service. The program also supports internationalized domain names, enhancing its usability for a global audience.
 
-## 🛠️ Description
+## ⚙️ Languages and Packages Used
 
-This program checks if your email adress is valid by looking for an '@' symbol and a '.'
+- **Language**: Python
+- **Packages**:
+  - `dnspython` - For DNS resolution and MX record checks
+  - `idna` - To handle internationalized domain names
 
-## ⚙️ Languages or Frameworks Used
-Python
+## 🌟 How to Run
 
-## 🌟 How to run
-Open the file AddressValidator.py file with the python IDE and hit run.
+Open the `AddressValidator.py` file with a Python IDE and hit run.
 
+## 🤖 Authors
 
-## 🤖 Author
-tommcgurn10
+- **m-hassanqureshi** - Primary author of the renewed code
+- **tommcgurn10** - Original author of the initial project