Modifications to the WordPress Postmark plugin

Hi,

The requirements are pretty simple: when a contact form on the website is submitted, we have to check in the background the email address submitted in the email field of the form. If this address is under a specific domain (for ex. @example.com), the email should be sent to a specific address, different from the one set in the to field of the contact forms. If the pattern is not met, the email is sent out to the recipient(s) specified in the admin - so practically there is no change in the email sending.

We need the modifications to the Postmark plugin (https://wordpress.org/plugins/postmark-approved-wordpress-plugin/) and >> NOT << to the contact form plugins.

The code which resolves this has to be inserted and work from the functions.php file of the child theme.

Please include I like Postmark in your offer so that I know you read all of the requirements.

Happy to answer to questions if something is not clear.

Deadline of the whole job is Monday afternoon.