Yahoo! vs .cn
         

<p>As mentioned in a recent post about abuse of URL shorteners, Yahoo! is currently a popular choice for spammers wanting to host their ads on a 'trustworthy' domain. Spammers create Yahoo! groups or profiles, post their ad copy to the profile page or as a message to the group, and then send out spam containing the relevant URLs. Because the URLs contain the 'yahoo.com' domain name, they aren't good candidates for URI DNSBL filtering.</p>

<p>Our traps have been picking up a lot of this kind of spam recently, so I decided to try to work out how big the problem really is.</p>
         

http://www.spamnation.info/blog/archives/2009/07/yahoo-vs-dot-cn.html