What are the key considerations for redirecting users based on specific MX record values in PHP scripts?

When redirecting users based on specific MX record values in PHP scripts, the key considerations include checking the MX record values of the domain the user is trying to access, determining the appropriate redirect destination based on those values, and handling any errors or exceptions that may arise during the redirection process. 

<?php
$domain = 'example.com';
$mx_records = dns_get_record($domain, DNS_MX);

if (!empty($mx_records)) {
    foreach ($mx_records as $record) {
        if ($record['target'] == 'mail.example.com') {
            header('Location: https://mail.example.com');
            exit();
        } else {
            header('Location: https://www.example.com');
            exit();
        }
    }
} else {
    // Handle error if MX records are not found
    echo 'MX records not found for domain: ' . $domain;
}
?>

Keywords

MX record redirection PHP scripts DNS lookup header redirection

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