What are the best practices for troubleshooting SSL certificate verification failures in PHPMailer?

When troubleshooting SSL certificate verification failures in PHPMailer, one of the best practices is to make sure that the certificate authority (CA) bundle is properly configured. This can be done by setting the `cafile` and `capath` properties in PHPMailer. Additionally, ensuring that the server's clock is correctly synchronized can also help resolve SSL certificate verification issues. 

$mail = new PHPMailer(true);

// Set the CA file and CA path
$mail->SMTPOptions = array(
    'ssl' => array(
        'verify_peer' => true,
        'verify_peer_name' => true,
        'allow_self_signed' => false,
        'cafile' => '/path/to/cafile.pem',
        'capath' => '/path/to/capath'
    )
);

// Set the server's clock synchronization
date_default_timezone_set('UTC');

Keywords

SSL certificate verification failures PHPMailer troubleshooting

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