Block emails from cart recovery (wp-cart-recovery.com)

functions.php

<?php

add_filter( 'crfw_should_record_cart', function ( $record_cart, $email, $cart_details ) {
	$blocked_emails = [
		'[email protected]',
	];
	if ( in_array( $email, $blocked_emails, true ) ) {
		return false;
	}

	return $record_cart;
}, 10, 3 );