TO any XO types here...
If you act on this one problem---
Take a look see here:
http://www.spamhaus.org/sbl/listings.lasso?isp=xo.com&-nothing=Search
http://www.spamhaus.org/sbl/listings.lasso?isp=xo.net&-nothing=Search
There are more than 30 entries of Known SPAM and at least 15 of which
has been identified as having SPAM business models....
Anyway..
J