On becoming the #3 most spammiest network according to Spamhaus
http://www.spamhaus.org/statistics/networks/
Looks like spamhaus is getting fed up with them
We respect your work in stopping the abusers when notified, and we know that yours is a legitimate business facing problems and not a shady network provider willing to provide bulletproof hosting.
However, many other ISPs, even those way larger than ColoCrossing, face the same abuse problem as ColoCrossing and they manage to keep it under control. The amount of resources assigned to spammers in their networks is orders of magnitude smaller than ColoCrossing's.
We've already notified how almost all the abusers signing up on your network are using fake IDs and how vetting/confirming these IDs can limit the problem. Nothing happened on this side, and abusers are still allowed to sign up providing fake names and addresses.
We've also suggested several times how placing rate-limits to outbound SMTP traffic can severely affect the "bad apples'" ability to abuse your resources to send spam, but again we've seen no indication of anything being arranged in this regard.
We've been playing whack-a-mole with you for a long time now: it's simply not working nor there seem to be an interest to really solve the problem on your part.
As already announced way too many times we have no further interest in wasting our time playing this game: the amount of SBLs we've been opening for your networks is far beyond unacceptable (565 in the latest 6 months).
Our first concern is about our users and how your apparent lack of control over your network is harming their ability to properly keep their mailboxes clean; therefore I'm afraid we're going to advise our users to not accept email traffic coming from your networks until we see a serious indication that the problem is being taken care of.