w3prodigy

Adds Whitelist and Blacklist options for Trackbacks and Pingbacks as well as the option to auto-accept Trackbacks from your own blog. These options can be found on the Discussion Options page.

Back List

Adds Whitelist and Blacklist options for Trackbacks and Pingbacks

DeveloperWil

If you need to prevent email addresses or entire email domains from being sent on an Elementor Form, this plugin will do that.
Stop unwanted Elementor Forms spam and create an email or domain name block list for your forms.
This is for Elementor Pro users only. This will not work with the free version of Elementor as it doesn’t support forms.
<h4>Plugin Page</h4>
<a href="https://zeropointdevelopment.com/wordpress-plugins/email-blacklist-for-elementor-forms/" title="Email Blacklist For Elementor Forms WordPress Plugin" rel="nofollow ugc">Email Blacklist For Elementor Forms</a>

Email Blacklist For Elementor Forms

Adds a text area control called "Blacklist" to the Elementor Forms control. Blocks outgoing emails if they match with any on the blacklist.

Back List vs Email Blacklist For Elementor Forms