Raul

<a href="https://www.unifiedsoftware.co.uk/solutions/email-validation-and-verification/" rel="nofollow ugc">EmailVal</a> is Unified Software’s <a href="https://www.unifiedsoftware.co.uk/solutions/email-validation-and-verification/" rel="nofollow ugc">email validation & verification</a> software. It’s an essential cloud-based solution that allows companies to instantly check the validity of email addresses entered by customers.
EmailVal is a web service. That means the <a href="https://www.unifiedsoftware.co.uk/solutions/email-validation-and-verification/" rel="nofollow ugc">email validation & verification software</a>, the dynamic validation rules and reference data, are all located on the EmailVal servers.
This plugin enables you to interact with EmailVal through an easy to use form optimised for all screen sizes that you can place anywhere on your website via a shortcode. Visitors to your website can then use the form to input email addresses which will be automatically validated against EmailVal and stored in a database table of your choice for future reference.

EmailVal – Email Address Validation & Verification

EmailVal is the easiest way to validate and store email addresses

shawfactor

mattsenate

This plugin is can be used for petitions, events, or any verified list and as far as I know is unique in WordPress.
Creating a petition/list/signup is as easy as adding a shortcode to a post or page (or CPT). From there additional editors are available to configure easch aspect of the sign up. Everything is completely self hosted and all list members become users of your site (not a third parties).
Available shortcodes:
[lh_signing_form] (enable signatories on any post, page, or custom post type)
Unconfirmed signatories: [lh_signing_unconfirmed_count]
Confirmed signatories: [lh_signing_confirmed_count]
Total signatories: [lh_signing_total_count]
[lh_signing_unconfirmed_list] (unformated list)
[lh_signing_confirmed_list] (unformated list)
You can customise the display of the signing form ([lh_signing_form]) via a number of shortcode arguments more information is available <a href="https://lhero.org/portfolio/lh-signing/" title="Additional Plugin documentation" rel="nofollow ugc">here</a>

LH Signing

LH Signing allows you to create configurable validated lists like petitions or event sign ups. It is the only self hosted solution in WP

EmailVal – Email Address Validation & Verification vs LH Signing