I installed it and tried commenting and received this error:
Go back and try again.
Error: empty answer. 
i thought it was great, since spam died off the second i installed it. unfortunately, so did all other comments, and i soon learned from readers that none of them were able to leave comments. they all received an error that the date field needed to be blank, and to try again. since the date field was apparently filling itself in, it viewed everyone as a spammer.
I was getting dozens of annoying spam comments daily until recently when I installed Anti-spam plugin. It was easy to install and so far appears to work well - it rejects spam comments but lets real human comments through. I hope it stays this way. My main concern was false rejections i.e. not allowing valid posts. So far, this does not seem to be happening. It would be interesting to know how many fake comments were rejected. (It is possible this info is available somewhere but during my quick look I did not see it.)
Overall, Anti-spam plugin is a great time-saver!
My site, http://idogenealogy.net, is fairly new but the spam comments were running about 15-25 per day. I checked each one and bad repeaters were added to a blocked IP form offered by my hosting company.
However, over a two-three week period more and more comments were slipping through as genuine comments and were spam. I started looking for a different plugin and found this one.
I have not rece'd a SINGLE spam since I installed it -- and deactivated & deleted the other one.
This has saved me at least an hour or more a week. I can't imagine what time it would save on an active site.
My blog suffering from 70-100 spams per day. After insatlling this awesome plugin, i'm not even getting single spam. I highly recommend this plugin.
Brilliant work! thanks indeed
Tested it by having Anti-spam redirect the spams blocked towards my mail. Result : 28 spams were blocked, not a single one posted to my site. Seems to work perfectly.
The plugin is just awesome!!! Previously I was getting around 30 to 35 spam comments in 1-2 days. It was reduced to 5-6 and after updating the plugin to the latest version today, I'm not even getting a single spam. I highly recommend this plugin.
We were getting hit from numerous (15+) spam messages a day. We figured this was an acceptable number to just handle manually, but quickly grew tired of taking the time to moderate these comments, marking them as trash.
We tried various CAPTCHA plugins but none were very graceful. From difficult-to-read CAPTCHA strings to stark, unstyled "You have entered an invalid CAPTCHA" message, none of the CAPTCHA plugins we implemented really worked for us.
Then I found this plugin. It's so simple in its implementation that it's almost laughable. There's beauty in what it does, though. It's not overly complicated, it doesn't affect the aesthetic of the site AT ALL, and most importantly, it just works.
I've had this plugin installed for over a week and have not received a single spam comment. I give it five stars all day long.
Just as a test, I went and toggled the value that sends spam comments to the site administrator. No less than 30 minutes later, I had received a message that was spam. I've since toggled the value back to "false" - but it's sure nice to know the plugin is working. :)
I still get a lot of spam,
Maybe is not working for me as i have a different theme modified.
Howeve the ideea is great.
It works and you don't have to do anything. Just install and activate and the spam stops.
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