DNSbl Details

What this DNSbl says about itself

The SORBS Dynamic User and Host List (DUHL) is similar to other DUL lists. However, many of the others are actually lists of dial-up ranges only. With cable modem and DSL access becoming more prevalent for home subscribers and dial-up becoming correspondingly more rare, the impact of lists of dial-up ranges only is reduced. Therefore, the SORBS DUHL is a list of netblocks where the address space is assigned dynamically to users and hosts regardless of the actual method of connecting those users and hosts to the network. Dynamic assignment of IP addresses makes identification of spam sources a little more difficult. It is a matter of debate as to whether a user at home should be running their own mail server. It is the opinion of SORBS that anyone competent enough to do so should be allowed to run their own mail server, but also, that all outgoing mail from dynamically assigned address space (and in a few cases even from statically assigned space) should be made to flow through the mail server(s) of the Internet service provider in question.

If you are a general internet user and not running a mail server on the IP you are checking being listed here is not an issue. In fact, this is normal for users on dialup, cable, and DSL. You should only be concerned if you are trying to run a mail server on the tested IP address.

Mail server administrators should never implement blacklists unless they are 100% sure of what they are doing. Misconfiguration can result in all incoming mail being blocked.

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