What I do is to check all the URLs present.
On the other side, you can ALLWAYS add some points to the score if you find a URL with redirection.
John Wilcock wrote:
On Tue, 27 Apr 2004 15:37:17 -0700, Eric Kolve wrote:
As well, just because one new redirector is found, doesn't mean the spamming community at large knows about it or knows they need to switch. Most will continue to use rd.yahoo.com, g.msn.com, etc. not knowing they need to switch.
Except that spammers are known to read antispam mailing lists, so you can be fairly sure that they will soon catch on.
If the problem of open redirectors becomes endemic, we could have another RHSRBL that we could look up URLs against to determine whether they are an open redirector. This would tell us whether we should try to resolve the redirect and could change dynamically as we discovered new ones much the same way URLs are added to the standard blacklist.
That sounds like the way to go - any hardcoded list is bound to come to the attention of the spammers sooner or later.
John.