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.

• 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

<?php

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

$from = '[email protected]'; // for SMTP FROM:<> command
$email = '[email protected]';

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

var_dump($smtp_results);

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 = '[email protected]'; // for SMTP FROM:<> command
$emails = array(
    '[email protected]',
    '[email protected]',
    '[email protected]',
    '[email protected]'
);

$validator = new SMTP_Validate_Email($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);