Spammers have found an open redirect in the ask.com website. These redirects are often used to mask their URL’s from RBL’s and services like Spamcop.

Redirect:
http://wzeu.ask.com/r?t=lyc&u=http://www.microsoft.com/

I have put Microsoft in as an example here anyone can put any URL in at he end to use this redirect. I have filed a support ticket with Ask about this.

A redirect that they were using at Go.com is still open a month later even after I sent them notice of it. (Lazy)