[SATLUG] Nolisting?

[Channing]

Daniel J. Givens wrote:
> Have you guys heard of this?
>
> http://www.joreybump.com/code/howto/nolisting.html
>
> I know we have some folks around here that have spent a lot of time thinking
> about the spam issues and wanted to get some thoughts on this practice?
>
> I personally think it sounds...well, not quite good for standards, but what do
> you think?
>   
Not too far back, this technique would have probably been very 
effective.  Now a days, spammers target lower priority MX listings in an 
effort to circumvent the more hardened, higher priority MXs.  There are 
a lot of shops out there who's higher priority MX service sits behind 
various SPAM defenses.  However, they have not taken the same measures 
for their secondary, or tertiary (if established) MXs.  Spammers have 
learned this and have started by passing the primaries all-together. 

Don't get me wrong, you may still stop the zombies and some of the other 
SPAM, but the spammers are already making nolisting look like just 
another measure in the heap of techniques a mail server admin needs to 
employ.


HTH,
Channing