I use cf_sebForm for all of my contact forms. Form spam is a constant problem for those forms. So, I set up a generic way to do filtering in those forms and wrote both cf_sebForm and SpamFilter.cfc to follow the same guidelines.
BlogCFC does a good job of preventing spam, but I sometimes get comment spam that I think SpamFilter.cfc could prevent. I decided to see how easily I could implement it on BlogCFC.
It turns out that it is pretty easy. I had to add a few lines to Application.cfm and addcomment.cfm. The drawback here is that I will have to repeat this process when I upgrade, but it is pretty painless.
I have been using SpamFilter.cfc to prevent form spam for nine months now with great success (and no user impact). Other than some new spam definitions (including one in this build), I haven't made any changes in a while - no bugs or problems to be fixed.
I just made an update to SpamFilter.cfc and I am releasing it as 1.0 Beta 2. This is a result of some spam that I have gotten on the contact form of my web site despite having SpamFilter.cfc working against that contact form. I really have to thank those spammers for helping me improve the product.
I was told last week that a client's contact form has been getting a lot of spam - on the order of 30 a day. We had a simple spam prevention measure in place, but that clearly wasn't doing the job. It was time for something a little more sophisticated.
