override is_email_callback( $email ) function

Hi @wpfed,

Thanks for reaching out! If you’d like to override the default is_email_callback and use a custom one, you can do so with the following snippet:

// Add custom email address validator for WP Mail SMTP - Other SMTP mailer.
add_action( 'init', function () {

	if ( class_exists( 'WPMailSMTP\MailCatcherV6' ) ) {
		\WPMailSMTP\MailCatcherV6::$validator = function ( $email ) {

			return is_email( $email );
		};
	}
} );

This will allow you to define your own callback logic instead of relying on the default.

Thanks again for your question!