Placeholder domains to whitelist? (Was: Re: [SURBL-Discuss] Probable FPs)

David B Funk dbfunk at
Sun Sep 12 07:37:57 CEST 2004

On Sat, 11 Sep 2004, Jeff Chan wrote:

> On Saturday, September 11, 2004, 10:47:03 AM, Ryan Thompson wrote:
> > Raymond Dijkxhoorn wrote to Jeff Chan and SURBL Discussion list:
> >>>>
> >>>> This was in a ProFTPd mailing list message "how do I set up a virtual
> >>>> host for "".
> >>
> >> Uhm, if people need to type 'some' domain, its often or,
> >> thats common use, and the spammer using does take nice advantage of
> >> this.
> > Yeah, and, unfortunately, there isn't much we can do about that to list
> > them, since they'll definitely be used in ham.
> I'm making a list of generic placeholder domains that people use
> in examples, with the idea to whitelist them all to prevent FPs.

Um, people, this precise issue is ancient history. The IETF community
ran into this buzz-saw years ago, and there is now a set of reserved
domain names -just- for sake of documentation & examples.

See RFC-2606, check out the registration info for "".

So we just need to encourage people to use the reserved names
(EG: "") rather than 'foo/bar/'

Dave Funk                                  University of Iowa
<dbfunk (at)>        College of Engineering
319/335-5751   FAX: 319/384-0549           1256 Seamans Center
Sys_admin/Postmaster/cell_admin            Iowa City, IA 52242-1527
#include <std_disclaimer.h>
Better is not better, 'standard' is better. B{

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