wpforms-blacklist-email.php

<?php

/**
 * WPForms Email Blacklist
 *
 * @author Bill Erickson
 * @link http://www.billerickson.net/code/wpforms-email-blacklist
 * 
 * @param string $honeypot, empty if not spam, honeypot text is used in WPForms Log
 * @param array $fields
 * @param array $entry
 * @param array $form_data
 */
function be_wpforms_email_blacklist( $honeypot, $fields, $entry, $form_data ) {

  	// Use the email as the key. The value will be used in the log
	$blacklist = array(
		'info@ranksindia.com' => 'Ranks India',
	);
	
	foreach( $form_data['fields'] as $id => $field ) {
		if( 'email' == $field['type'] && array_key_exists( $entry['fields'][$id], $blacklist ) )
			$honeypot = '[Blacklist] ' . $blacklist[$entry['fields'][$id]];
	}
	
	return $honeypot;
}
add_filter( 'wpforms_process_honeypot', 'be_wpforms_email_blacklist', 10, 4 );

I'm sorry to say that this doesn't work now.

It should still work. The filter is still in place in WPForms.

If you're having issues, I recommend contacting WPForms support.

They are saying that it doesn't work because it's old. I have been in contact many times today. Oh well.