Tim Mayer from Yahoo! at a thread at Search Engine Watch Forums named Rackspace hates Yahoo? Or Vice Versa? said:
We did some further testing and our crawler IPs are in fact blocked from Rackspace.
Tim said this happens quote often with hosting companies. He continues by explaining, "A customer of a hosting company like rackspace may have a customer that is being hit by our crawler and not realize who it is so they report the IP to rackspace or another provider and they block the IP at the router level."
And to think that a few years ago, I actually had a few clients sign up with RackSpace, good thing they canceled soon after.
