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WS Form is a premium WordPress form builder with its own field types and conditional logic. Format checks still miss disposable inboxes and domains with no mailbox. DeBounce added a dedicated WS Form checkbox in plugin version 5.6.5: tick it in Settings → DeBounce.io Email Validator after you paste your API key. You do not add a WS Form action or hook for DeBounce unless a custom field skips WordPress email validation.
Update to plugin 5.6.5 or later, add your API key, and tick WS Form. Email fields are checked on submit.
DeBounce uses a multi-layer checking process, with every single email going through the following testing and cleaning steps:
DNS validation, including MX record lookup
Disposable email address detection
Misspelled domain detection to prevent Typosquatting
Syntax verification (IETF/RFC standard conformance)
Temporary unavailability detection
Mailbox existence checking
Catch-all testing
Greylisting detection
SMTP connection and availability checking
Read the list below for our frequently asked questions. If your question is not listed here, then don’t hesitate to contact us. We’d love to hear from you!
Use DeBounce.io Email Validator 5.6.5 or later, paste a standard API key, and tick WS Form. If you do not see that checkbox, update the plugin first.
No. Ticking WS Form on the DeBounce settings screen is the integration. Keep your existing WS Form actions for mail and CRM; they should only run after a successful submit.
Some custom field types skip is_email(). Add the CSS class debounce-mail on that email field and the debounce_activate_third_party() snippet to your child theme, as documented on the WordPress plugin page.
No. The WordPress plugin is server-side and needs a normal API key from the API section of your DeBounce account. Do not paste the public widget key here.
No. API lookups are not stored by DeBounce. Successful WS Form entries remain in WordPress.
