E-Mail Whitelist

Hi @talaris

I hope you’re well today!

There is no such feature currently but this custom code – with a slight modification – should help:

https://gist.github.com/adczk/30c20df28ec739ccc87ebb98dad20d50

To add it to the site and make it work they way you need:

1. create an empty file with a php extension (e.g. “forminator-allow-email-domains-only.php”) in the “/wp-content/mu-plugins” folder of your site’s WordPress install on your server

2. copy raw code form that link and past it into the file

3. now to configure the code:

a) in this line

$mail_forms = array( 1445 );

replace 1445 with an ID of your form (or comma-separated list of IDs); form ID is the number you see in form’s shortcode

b) in this line

$mail_field = 'email-1';

adjust e-mail field ID if needed; this field will be checked

c) in this line

$error_msg = 'Invalid e-mail address!';

customize your error message

d) and in this part

$disallowed = array(
		'@gmail.com',
		'@yahoo.com'
	);

set e-mail domains that you want to allow;

Note that it says “disallowed” but don’t worry about it. This code was initially meant to block selected e-mail domains but below is a way to modify it to work opposite way – block all except those defined in above code.

c) now let’s add the modification; replace this line

if ( stristr( $email, $to_check) ) $submit_errors[][$mail_field] = $error_msg;

with this

if ( ! stristr( $email, $to_check) ) $submit_errors[][$mail_field] = $error_msg;

4. save the file and test it.

It should now issue your custom error below the e-mail field on the form each time you use e-mail address from a different domain than any of the domains specified in the code.

Best regards,
Adam