[SURBL-Discuss] Blacklisting 4th level domains possible? (dsl.connexus.net.au)

Jeff Chan jeffc at surbl.org
Fri Nov 24 08:53:42 CET 2006

On Thursday, November 23, 2006, 11:19:23 PM, Kelly Jones wrote:
> Can SURBL blacklist 4th level domains? "connexus.net.au" is a
> perfectly valid domain, but subdomains of "dsl.connexus.net.au" are a
> bit suspicious.

The quick answer is no.  If a domain is valid, then the owner of
the domain should be responsible for cleaning up the abuse of
their domain.

> I got a spam referencing 106-147.dsl.connexus.net.au, probably someone
> running a webserver on their DSL connection.

It's probably an infected computer on a home DSL connection.  You
should report those to the DSL provider.

> Reading http://www.surbl.org/implementation.html and
> http://spamcheck.freeapp.net/two-level-tlds makes me think only 2nd
> and 3rd level domains can be blacklisted.

Yes, that's generally true.

Jeff C.
Don't harm innocent bystanders.

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