Re: dynamic IP range and good RBL?

[jp...@codemist.co.uk]

>>>>> "Ryan" == Ryan L Sun <li...@gmail.com> writes:

 Ryan> Does "dul.dnsbl.sorbs.net" list all the dynamic IPs?
 Ryan> Or just the dynamic IPs which fall in spamtrap?

It includes IP addresses that are not dynamic as well.  It seems to
make unintelligent guesses as well

==John ffitch

Re: dynamic IP range and good RBL?

[Matt Kettler <mk...@evi-inc.com>]

jpff@codemist.co.uk wrote:
>>>>>>"Ryan" == Ryan L Sun <li...@gmail.com> writes:
> 
> 
>  Ryan> Does "dul.dnsbl.sorbs.net" list all the dynamic IPs?
>  Ryan> Or just the dynamic IPs which fall in spamtrap?
> 
> It includes IP addresses that are not dynamic as well.  It seems to
> make unintelligent guesses as well

Well, ALL RBLs list some IPs that don't fit their criteria. Mislistings are a
fact of life for every RBL operator.

In general I find the SORBS DUL quite accurate, unless your SA trust path is
broken and SA winds up checking source IPs instead of only checking the
delivering relay. (By default you WILL suffer from this problem if you have a
NATed mailserver.)

However, rather than theorizing about how SORBs DUL works, why not just read
their FAQ:

http://www.us.sorbs.net/faq/dul.shtml

In theory, all dynamic IPs will be listed, and all static will be excluded.
Reality is significantly less perfect than theory. However, the FAQ will also
point you in the right direction for fixing errors.

Large ISPs can get an ID to directly register information, end users can submit
information via a web mail form for consideration by the SORBs operators.