nanog mailing list archives
Re: SORBS Contact
From: Steve Atkins <steve () blighty com>
Date: Wed, 9 Aug 2006 21:03:49 -0700
On Aug 9, 2006, at 8:29 PM, Robert J. Hantson wrote:
So with all this talk of Blacklists... does anyone have any suggestionsthat would be helpful to curb the onslaught of email, without being an adminidictator?Right now, the ONLY list we are using is that which is provided throughspamcop. They seem to have a list that is dynamic and only blacklists during periods of high reports, then takes them off the list after a short time... Or am I just a little naive?
Fairly naive. Spamcop blacklists a lot of IP addresses that send a lot of email that isn't spam. And some that send zero spam, by any sane definition. That doesn't mean to say it doesn't work for you, but don't mistake a list that'll block a mailserver for a week on the basis of one or two unsubstantiated reports as _safe_ solely because it will only block it for a week. Depending on your demographics SpamCop may have an acceptablefalse positive level, but it's not a list I advise most users to use as it
regularly lists sources of large amounts of non-spam (such as, for example, mailservers used solely for closed-loop opt-in email). Despite that, though, it's quite effective if you're prepared to accept the false positive rate. You may want to look at the CBL or XBL if you're interested in a very effective IP based blacklist with a very low level of false positives. Not zero, but really pretty low. Pretty much all the others have levels of false positives that are bad enough that I wouldn't use them myself, though depending on the demographics of your recipients they may be acceptable to you. Using them to block mail to all recipients is likely to be problematic in most cases. Some recipients who choose to use it? Sure. As part of a scoring system? Perhaps. Blocking across all users? Probably a bad idea in most cases. Cheers, Steve
Current thread:
- Re: SORBS Contact, (continued)
- Re: SORBS Contact Albert Meyer (Aug 09)
- Re: SORBS Contact Andrew D Kirch (Aug 09)
- Re: SORBS Contact Michael Nicks (Aug 09)
- Re: SORBS Contact Laurence F. Sheldon, Jr. (Aug 09)
- Re: SORBS Contact Allan Poindexter (Aug 09)
- Re: SORBS Contact Matthew Sullivan (Aug 09)
- Re: SORBS Contact Allan Poindexter (Aug 09)
- Re: SORBS Contact Christopher L. Morrow (Aug 09)
- RE: SORBS Contact Robert J. Hantson (Aug 09)
- RE: SORBS Contact Christopher L. Morrow (Aug 09)
- Re: SORBS Contact Steve Atkins (Aug 09)
- Re: SORBS Contact Rich Kulawiec (Aug 10)
- Re: SORBS Contact Albert Meyer (Aug 09)
- Re: SORBS Contact Todd Vierling (Aug 09)
- Re: SORBS Contact Allan Poindexter (Aug 09)
- Re: SORBS Contact william(at)elan.net (Aug 09)
- Re: SORBS Contact Allan Poindexter (Aug 09)
- Re: SORBS Contact william(at)elan.net (Aug 10)
- Re: SORBS Contact Todd Vierling (Aug 09)
- Re: SORBS Contact Steve Sobol (Aug 10)
- Re: SORBS Contact Derek J. Balling (Aug 09)
- Re: SORBS Contact Allan Poindexter (Aug 09)