I attempted to send an email to a known corporation (Ashley Funrniture) ashleyfurniture.com
via c60.cesmail.net
It bounced back with an error message indicating
5.1.0 - Unknown address error 554-'Service unavailable; Client host [216.154.195.49] blocked using bl.csma.biz; http://bl.csma.biz/cgi-bin/listing.cgi?ip=...mp;src=ewr'
Further checking on DNSSTUFF.COM indicates, it is also on the another version of their list, plus 1 other list.
But the site(bl.csma.biz) did give a 'removal' button, which I used...
A second list on bl.csma.biz had not removal option...
Also the other size (http://www.wpbl.info/) gave a removal button, which I used..