Check if Email Address Valid or Not in Python

Last Updated : 8 Apr, 2026

Given a string that represents an email address, our task is to determine whether it follows the correct format. A valid email generally contains a username, @ symbol and a domain name. For example:

Valid: my.ownsite@our-earth.org, user123@gmail.com
Invalid: myownsite.com, user@@gmail.com

Below are different methods to check if email address is valid or not in Python.

Using email_validator

This method uses email_validator package (not part of Python’s standard library) to validate emails by applying strict rules defined in email standards. It checks the username, domain format and whether the domain part is valid.

Note: Before using methods, install the required third-party libraries using pip:
pip install email-validator validators

Output

Valid Email

Explanation:

validate_email(email): Verifies the email structure, domain and returns a detailed result object when the email is valid.
res: Stores validated information such as normalized email format.
print("Valid Email"): Runs only if validation succeeds; validate_email() itself will raise an error if the email is invalid.

Using validators Package

This method uses the validators package (not part of Python’s standard library) to check whether the email fits a valid pattern. It automatically examines the username, @ symbol and domain format together and returns True/False accordingly.

Output

Valid Email

Explanation:

validators.email(email): Returns the email itself if valid, otherwise False.
if condition: Used to classify email as valid or invalid.

Using RegEx (re.fullmatch)

This method uses a regex pattern to match the entire email string. It validates each part ensuring the full email follows allowed character rules.

Output

Valid Email
Invalid Email

Explanation:

re.fullmatch(regex, email): Ensures the entire string matches the pattern.
[A-Za-z0-9._%+-]+ allowed characters in username, @ mandatory separator, [A-Za-z0-9.-]+ domain name and \.[A-Za-z]{2,7} extension like .com, .org

Using re.match

This method checks whether the email starts with a valid email pattern. It does not force the entire string to match, but still validates the username, @ and domain portion from the beginning.

Output