Slashdot Mirror

← Back to Stories (view on slashdot.org)

Choosing a Good DNSBL

Posted by CmdrTaco on from the can-it-filter-all-pr-firms dept.

stry_cat submitted a story about selecting a good DNSBL. It talks about some of the problems with DNS blacklists and the sorts of things that you should be looking for. Things like Speed, Selection Criteria, and Goals make the list. And of course not requiring payment to be removed from the blacklist.

3 of 152 comments (clear)

  1. Al Iverson is your FRIEND. by seebs · · Score: 5, Informative

    http://stats.dnsbl.com/

    Or, for commentary:

    http://www.dnsbl.com/

    Absolutely the best resource on the topic.

    --
    My blog: http://www.seebs.net/log/ --- My iPhone/iPad app: http://www.seebs.net/seebsfrac/
  2. Requiring payment for delisting by dbolger · · Score: 5, Informative

    I used to work in the abuse department of an ISP which had been blacklisted by SORBS. SORBS require a "donation" to get your IP range off their list, and since we refused to hand over extortion money to these gangsters, there was no way for us to deal with them. Despite our best efforts, we also found that there was no way to get in contact with them, and as such no way to help our customers.

    Doing a Google search for information about this lot brought up so many horror stories that I can't fathom how so many people ended up using their "service". It got to the stage where if we had a customer having trouble with SORBS blocking their mail, the only advice we could give was to contact their recipient via other means and ask them to stop using these thugs to filter mail.

  3. Local Whitelisting! by HitekHobo · · Score: 5, Informative

    Choosing a good DNSBL (or three!) is definitely important, but IMHO, you should NEVER run DNSBL's without building a local override into the system. We run our own DNSWL (dns whitelist) which is consulted before hitting on BLs... if a customer has had problems with one of their contacts being blacklisted, we can selectively add their IP to the list.

    Unrelated to the above, I would also recommend looking at ironport systems if this is a commercial project with a decent sized budget. (I am not affiliated, just a happy customer).

    --
    A couple of 30-somethings embark on the ultimate roadtrip