[SURBL-Discuss] List of URL redirectors and Perl code to parse them?

Jeff Chan jeffc at surbl.org
Mon Jan 15 05:23:35 CET 2007

On Sunday, January 14, 2007, 4:24:17 PM, Kelly Jones wrote:
> Thanks, Jeff. My mistake here. My example was too simple.

> I was thinking more of things where the "http://" is replaced with
> "http/0/", or the URL is hex-encoded or percent-encoded, and even
> redirectors that don't need "http://" in the target at all.

> In other words, redirectors where the target isn't obviously a
> URL. Simple examples:

> http://redirector.site/http/0/www.target.site/path [no "http://"]
> http://redirector.site/www.target.site/path [no http at all]
> http://redirector.site/target.site/path [hard to tell this is a redirect]

Current SpamAssassin catches all of the above.

> and even worse examples where the target site is "%23%26%29..." or
> whatever. Some redirectors "de-encode" %xx by accident, and spammers
> can use that to mask their domain name from SpamAssassin, etc.

These too, as Daryl mentions.

> It'd be good to have a list of redirectors so any URL could be
> "canonized" and then people could check the canonized URL against SURBL.

Any list can be used by both the good guys and the bad guys.

Jeff C.
Don't harm innocent bystanders.

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