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+5 votes
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Description: An easy to use customizable captcha with a honeypot that keeps 99 % of the daily spam away.

Video: https://www.youtube.com/watch?v=BRBrqyD7h-s&wide

"You have problems with spam bots contaminating your forum? Your users have problems filling out the reCaptcha-Anti-Spam? Then the Stop-Spam-Plugin is the perfect solution for you."

more info at: http://www.q2apro.com/plugins/stop-spam

plugin price: only 24 USD

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edited by
Added new optional features to the plugin:
- Prevent user with same IP from voting for his own posts and selecting his answers as best.
- Remove email addresses from posts. Example: spam@forum.com becomes *Emails are not allowed*
- Remove too many linebreaks and merge them into one. Also remove empty linebreaks in the post end.
- Number of allowed links per post: x
- Notify admin by email if this mentioning is found: *adminmail
- Disallow certain languages, separate them by comma. Available are: Han,Hangul,Hebrew,Arabic,Cyrillic,Greek,Khmer. Note: "Han" stands for Chinese.
- Spam words that prevent the posting to be submitted

For a full list see http://www.q2apro.com/plugins/stop-spam
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nice updates @q2apro... :)
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added:
- list all links in all forum posts on a separate page to find spam links quickly
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Some feature not working.please fix

1 Answer

+1 vote
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This is the best anti-spam plugin in my humble opinion. Everybody should know that Kai offers it for free. Thanks a bunch for that!
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I have added all of them here. Thanks to @Kai
https://docs.question2answer.org/addons/plugins/
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Yes, Suresh!
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+1
To make the best use of it, you have to understand your spammers. For example, they often use spam mails like 163.com, inbox.ru, bk.ru..., so you put those domains, or part of those domains in your spam list.

I tried several ways to bypass this anti-spam but failed. But even when some advanced spam bots can bypass this, it can still protect you from "average" auto-keying bots. For human spammers, you can create a unique question that only real users may answer.

The tool has some other features to protect you. If you understand your spammers, you will find the tool useful. For example, if your spammers speak Norwegian language like the ones that come to my site today. You put some common Norwegian words in the spam list. For some other languages, the tool already has the feature to stop those languages.
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