Validate Fluent Forms email fields without rejecting real users
Check every email field the moment a Fluent Form is submitted. Mail7 blocks only addresses it can confirm are invalid and lets everything it cannot confirm through, so genuine visitors are never turned away.
Download and install the add-on directly today. Requires Fluent Forms.
Real-time validation on every email field
The add-on hooks Fluent Forms’ own field-validation step, so each email field is checked before the entry is stored. Behind every check is a real verification: address format, the domain’s MX records, and an SMTP mailbox probe, not just a syntax test.
Valid, Not Valid or Unknown: why the third answer matters
Most validators force a binary verdict and reject anything they are unsure about, quietly turning away real people behind catch-all domains or greylisting. Fluent Forms with Mail7 returns three honest outcomes:
The mailbox exists. The form submits.
Confirmed invalid. The only case that is blocked.
Could not be confirmed. Allowed through by default, never rejected.
Fail-open by design
Validation should protect your entries, not stand between a real customer and your form. If Mail7 is ever unreachable or times out, the add-on fails open: the submission proceeds exactly as it would without the plugin. You never lose a lead to a network blip.
Install the add-on in three steps
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1
Download the add-on
Grab the zip from the button above (Fluent Forms must be active).
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2
Upload and activate
In WordPress go to Plugins, Add New, Upload Plugin, choose the zip, then Activate.
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3
Set it up
Open Settings, Mail7 (Fluent Forms) and optionally add an API key. Every email field is now validated on submit.
Free single checks, paid plans for volume
Single checks are free with no account, so you can preview the exact result the add-on acts on. A paid plan raises your API volume for high-traffic forms, and you are only charged for definite Valid and Not Valid results. Unknown checks are always free.
Related integrations
Frequently asked questions
Does it block real users with unusual mailboxes?
No. Catch-all, greylisted or disposable addresses return Unknown and are allowed through by default, never rejected.
Do I need Fluent Forms?
Yes. This add-on validates Fluent Forms email fields and only acts when Fluent Forms is active.
What happens if Mail7 is unreachable?
The add-on is fail-open: on any API error the submission proceeds normally.
Where are the settings?
Under Settings, Mail7 (Fluent Forms), where you can add an optional API key and enable strict mode.
Is it free?
Single checks are free with no account; paid plans add API volume for high-traffic forms.