verifier.py

import re
import smtplib
from email.utils import parseaddr
from verify_email import verify_email
from email_validator import validate_email, EmailNotValidError, caching_resolver

def is_valid_email(email):
    email_pattern = r'^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$'
    return re.match(email_pattern, email)

def check_email_exists(server, email):
    try:
        username, domain = parseaddr(email)
        if not domain:
            return False

        with smtplib.SMTP(server, timeout=10) as smtp:
            code, message = smtp.helo()

            if code != 250:
                return False

            code, message = smtp.mail("example@example.com")
            if code != 250:
                return False

            code, message = smtp.rcpt(email)
            if code == 250:
                return True

    except Exception as e:
        print(f"Error: {str(e)}")
    return False

def verify_and_check_emails(input_file, output_file):
    verified_emails = []

    resolver = caching_resolver(timeout=10)

    with open(input_file, 'r', encoding='utf-8') as file:
        lines = file.readlines()
        for line in lines:
            line = line.strip()
            if is_valid_email(line):
                # if check_email_exists(line):
                #     verified_emails.append(line)

                # if verify_email(line):
                #     verified_emails.append(line)

                try:
                  emailinfo = validate_email(line, dns_resolver=resolver, test_environment=False, allow_empty_local=False, check_deliverability=True)
                  line = emailinfo.normalized
                  verified_emails.append(line)
                except EmailNotValidError as e:
                  print(str(e))

    with open(output_file, 'w', encoding='utf-8') as file:
        for email in verified_emails:
            file.write(email + '\n')

if __name__ == "__main__":
    input_file = input("Enter the path to the input file: ")
    output_file = input("Enter the path to the output file: ")

    verify_and_check_emails(input_file, output_file)

    print("Email verification completed. Verified emails saved to", output_file)