Validate MailWizz subscribers on signup and import

Validate on subscribe and on list import

The extension hooks the point where a subscriber is saved, so both single subscribe forms and bulk list imports run through Mail7. Bad addresses are caught at the source instead of after they have polluted your list.

Block confirmed-invalid, keep everything else

Mail7 returns three honest results, and only one is ever rejected at subscribe time:

Unknown addresses stay on the list, and why

Unknown means the mailbox could not be confirmed, typically a catch-all domain, greylisting, or a server that blocks SMTP checks. Rejecting those at subscribe time would turn away reachable people, so the extension keeps them.

Cleaner imports, fewer hard bounces

Filtering out confirmed-invalid addresses as they arrive means your next send hits fewer dead mailboxes, which protects your delivery rate and sender reputation without shrinking your genuine audience.

Install the extension in MailWizz

1. 1

   Download the extension

   Grab the extension archive from the button above.

2. 2

   Upload in the backend

   In MailWizz go to Extensions, upload the archive and enable it.

3. 3

   Add your API key

   Enter a Mail7 API key in the extension settings for higher volume.

Free single checks, paid plans for volume

Single checks are free with no account, so you can see exactly what the extension acts on. Paid plans raise your API volume for large lists, and you are only charged for definite Valid and Not Valid results. Unknown checks are always free.

Related integrations

Frequently asked questions