We are using SP Page Builder for a site and it looks like one of forms is hacked.
We are using Form Builder to create a contact us form on the home page and some how it is being edited before the email is being sent. We then get a bunch of emails relayed through our SMTP gmail account. W echanged all the passwords and added a captcha but this is still happening when ever re-enable the form. We tried deleting and recreating it and it still happens.