Check if mail address exists

There are several ways to check if an email address exists or not. Here are a few methods:

Method 1: Using a simple HTTP request

You can send an HTTP request to the email address with a specific format, such as mailto:[email protected]. If the email address exists, the server will respond with a 200 OK status code. If the email address does not exist, the server will respond with a 404 Not Found status code.

Here's an example using Python:

import requests

email = "[email protected]"
url = f"mailto:{email}"

response = requests.head(url)

if response.status_code == 200:
    print(f"{email} exists")
else:
    print(f"{email} does not exist")

Method 2: Using a DNS lookup

You can perform a DNS lookup to check if the email address exists. If the email address exists, the DNS server will respond with a record that contains the mail server's IP address. If the email address does not exist, the DNS server will respond with a "no such domain" error.

Here's an example using Python:

import dns.resolver

email = "[email protected]"
domain = email.split("@")[1]

try:
    records = dns.resolver.resolve(domain, "MX")
    print(f"{email} exists")
except dns.resolver.NoAnswer:
    print(f"{email} does not exist")

Method 3: Using a mail server

You can connect to the mail server and send a simple command to check if the email address exists. If the email address exists, the mail server will respond with a "250" status code. If the email address does not exist, the mail server will respond with a "550" status code.

Here's an example using Python:

import smtplib

email = "[email protected]"
domain = email.split("@")[1]

server = smtplib.SMTP()
server.connect((domain, 25))
server.helo()
server.mail("[email protected]")
server.rcpt(email)
server.quit()

if server.response[0][0] == 250:
    print(f"{email} exists")
else:
    print(f"{email} does not exist")

Method 4: Using a third-party API

There are several third-party APIs that provide email address validation services. These APIs can be used to check if an email address exists or not. Here's an example using the email-validator library:

import email_validator

email = "[email protected]"

try:
    email_validator.validate_email(email)
    print(f"{email} exists")
except email_validator.EmailNotValidError:
    print(f"{email} does not exist")

Note that these methods are not foolproof and may not always work. Email address validation is a complex task, and there are many ways to validate an email address.

Mail Knowledge

Check if mail address exists