Add Recaptcha or Honeypot to Follow Ups mailing list sign up shortcode to prevent spam sign ups
Right now, there is nothing that is preventing bots from spam signing up to a mailing list. There is a known scam strategy in which a scammer signs a victim up for tons of mailing lists, thus the victim might miss an email from their bank or PayPal telling them about a large withdrawal. That, and all the spam email addresses take up resources when sending out newsletters. I probably have 2,000 spam email addresses in my mailing list and I can't do anything about it!