Scans email addresses/usernames/IP addresses against the stopforumspam.com database and then blocks or deletes the accounts.
You can set the threshold - i.e. how many times an email address needs to be listed in the spam database before action is taken.
You can also have it scan your entire existing database, not just new users. (It does this via a configurable cron run.)
Tested with D7.
Block registrations (wildcards on email address and username)
Useful if you're getting persistent spam registrations from certain domains.
Tested with D7. This used to be in core in D6.
Use in conjunction with the Captcha module to prevent spam on forms.
As of Jan 2020, still ONLY supports v2 of Google's reCAPTCHA API (there's an active issue for v3 support)
There's also an option for non-js fallback.
Tested with D7 and D8.
Patch needed for AJAX forms (e.g. Webforms with AJAX support turned on) to stop the ReCAPTCHA UI disappearing when page is reloaded.
Framework for using (many) different types of captchas on forms such as user_registration.
e.g. try 'reCAPTCHA' which is Google's "I am not a robot" captcha. Personal experience is that's much better at preventing spam than the standard "image" one.
Tested with D7.
Adds spam prevention to forms (you can select which, including user registration and contact).
Recommended settings:
- turn logging on (look for entries of type = honeypot in /admin/reports/dblog
- if using time limit - i.e the minimum amount of time form is expected to be on screen before module things it's a real person, not a bot, suggest 5 seconds rather than 10 (too agressive when using browser autocomplete for, for example, email address on password reminder form)
DO NOT USE - security issue and Acquia will no longer support or maintain it.
Spam filtering SaaS from Acquia. Free for up to 50 "ham" messages a day. Scans message then provides a captcha if appropriate, scores each message for reputation, spam etc. I never tried this module and anecdotally I've seen mixed reports / people suggesting it's not all that good.