Question

There seems to be a bot attempting to spam through my contact form – attempting to send hundreds of emails with PURE gibberish:

1vvQZe mnfxobzahiga, [url=http://dxicyigwtdyn.com/%5Ddxicyigwtdyn%5B/url%5D, [link=http://hhulyjnulbvz.com/%5Dhhulyjnulbvz%5B/link%5D, http://nfggzmenyqcl.com/

I’m really trying to keep from using captchas on my site, but this is getting ridiculous.

1. can anybody explain exactly what these spammers are trying to do?
2. what non-captcha lengths can i go through to detect them? keep in mind that they are switching IP’s every email

Answer 1

A solution that often helps when fighting against spam, that is used by several blogging-engines (I use it on my blog, and it’s not bad), is akismet : they provide a free service for personnal use — and there is some service for commercial use too.

I’ve never used their API directly, but, basically, I suppose you send it the comment, and you get in return an information saying “spam” or not.