Currently there are three DNSBL-groups in Disruptor OL:
- common DNSBLs
The common DNSBLs can be used for the usual blocking job: they
list 'well known spam sending IPs'.
'blackholes.us' is a DNSBL that groups sender IPs by different
aspects: location based or provider based. So if you decide to
block all mails coming from Wanadoo (a large France ISP), simply
check this DNSBL.
'countries.nerds.dk' has the same intention like 'blackholes.us',
but is a little more detailed and completely...
Be warned: both list IPs regardless whether they really send
spam or not.