Email Subscribers does various form validation checks included in the script, but we offer additional options to prevent spammers from abusing the subscription forms and for better protection under
Email Subscribers > Settings > Security
- Enter the domain names from which you have a high number of spammers or the domains that you suspect, e.g., mail.ru in the
Blocked Domain(s)box to block them
Block Known Attackersto automatically block known attackers who match our database
- Make sure
Fake Emailsis checked to automatically block fake emails
- Finally, enable
Captchato show the captcha field on your subscription forms
Above steps greatly reduce the number of spammers.
Options #2, #3, and #4 are available with Paid plans.