++ 25/05/15 13:47 -0400 - tor@t-3.net:
Doing nothing on email ports but still ending up on a meaningful number of RBLs doesn't sound right. Maybe all it took to piss the ISP off was for one of them to do it.
Maybe. Maybe there has been some internal policy change within Leaseweb, maybe there has been a policy change on some sites deploying particular DNSBL's triggering a change of policy within Leaseweb. So many possibilities to choose from. :)