MailBluster does not support duplicate leads as each email address is unique. If a subscribed lead fills out the form again using the same email address, the lead’s existing information will be updated instead of creating a new entry.
While a success message will be shown (based on your preferences set under Forms > Advanced), MailBluster currently does not send a separate notification when an existing lead resubmits the form. So, there’s no built-in way to get notified specifically when a subscribed lead fills the form again.
