title: Gibberish spam - what does this mean?
body: <p>There seems to be a bot attempting to spam through my contact form - attempting to send hundreds of emails with PURE gibberish:</p>
  
  <blockquote>
    <p>1vvQZe  mnfxobzahiga, [url=<a href="http://dxicyigwtdyn.com/]dxicyigwtdyn[/url]" rel="nofollow noreferrer">http://dxicyigwtdyn.com/]dxicyigwtdyn[/url]</a>, [link=<a href="http://hhulyjnulbvz.com/]hhulyjnulbvz[/link]" rel="nofollow noreferrer">http://hhulyjnulbvz.com/]hhulyjnulbvz[/link]</a>, <a href="http://nfggzmenyqcl.com/" rel="nofollow noreferrer">http://nfggzmenyqcl.com/</a></p>
  </blockquote>
  
  <p>I'm really trying to keep from using captchas on my site, but this is getting ridiculous.</p>
  
  <ol>
  <li>can anybody explain exactly what these spammers are trying to do?</li>
  <li>what non-captcha lengths can i go through to detect them? keep in mind that they are switching IP's every email</li>
  </ol>