SMTP_Validate_Email

Perform email address validation/verification via SMTP.

The class retrieves MX records for the email domain and then connects to the domain's SMTP server to try figuring out if the address really exists.

Some features (see the source for more)

• Not really sending a message, gracefully resetting the session when done
• Command-specific communication timeouts implemented per relevant RFCs
• Catch-all account detection
• Batch mode processing supported
• MX query support on Windows without requiring any PEAR packages
• Logging and debugging support

Basic example

<?php

require('smtp-validate-email.php');

$from = 'a-happy-camper@campspot.net'; // for SMTP FROM:<> command
$email = 'someone@somewhere.net';

$validator = new SMTP_Validate_Email($email, $from);
$smtp_results = $validator->validate();

var_dump($smtp_results);

Array usage

The class supports passing an array of addresses in the constructor or to the validate() method. Checking multiple addresses on the same server uses a single connection.

<?php

require('smtp-validate-email.php');

$from = 'a-happy-camper@campspot.net'; // for SMTP FROM:<> command
$emails = array(
    'someone@somewhere.net',
    'some-other@somewhere-else.net',
    'someone@example.com',
    'someone-else@example.com'
);

$validator = new SMTP_Validate_Email($emails, $from);
$smtp_results = $validator->validate();

// or passing to the validate() method
// $validator = new SMTP_Validate_Email();
// $smtp_results = $validator->validate($emails, $from);

var_dump($smtp_results);