Integrating Ban Hammer with Contact Form 7

  • Hello —

    I’m trying to block spam domains and other free email domains from submitting forms. There is a Ban Hammer plugin which looks really good but integrates only with the register_user hook. I’ve seen other emails use the is_email hook that work with Contact Form 7 or perhaps the email validation system.

    How can I hook in Ban Hammer or other plugins to enable blacklist of email domains in the system?

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