>
> ...omissis...
>
> I've considered the exact opposite (adding static to the check for 
> keywords).  My rules are really looking more for "is this a _client_ 
> host", not "is this a dynamic host".  That one check looks for 
> "dynamic", but I'm not interested in exempting anyone because they're 
> "static".  They've still got a hostname that looks like an end-client, 
> and an end-client shouldn't be connecting to other people's mail 
> servers.  Any end-client that connects to someone else's email server 
> should be treated like it's a spam/virus zombie.

I'm not comfortable with this: the border between an end-client and a server is 
really unclean. Also, what about and end-client server? :)

I don't understand the push toward using the ISP's mail server to send mail. I 
guess that an end-client may legitimally run its own mail server without 
relaing its outgoing mail to its internet provider.

I can, however, well understand the need for a legitimate mx to be tied to a 
static address. That make sense for identification purposes.

What's wrong with small businesses running their own mx? Just guessing: isn't 
that the blame about this originates from large ISPs that just want to tight 
their customers?

-----------------------------------
Giampaolo Tomassoni - IT Consultant
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> 
> 
> >> SORBS uses the following Internet Draft for determining 
> whether networks
> >> are statically or dynamically by rDNS:
> >> http://tools.ietf.org/wg/dnsop/draft-msullivan-dnsop-generic-namin
> >> g-schemes-00.txt
> > 
> > Right. Also, SORBS goes a bit (too?) further by including the 
> "pool" word in RDNS as a dynamic address indicator. This sounds 
> not that correct to me.
> > 
> 
> I've also thought about adding pool to my list of keywords ... I just 
> thought it might be a little too generic.
> 

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