Re: smtp questions

That makes sense because "the conneting IP is in the same domain" for
this example. I forced asdcb1@uaa.alaska.edu as the from address on
the email, and the machine I'm developing on is on the uaa network.
Maybe I'd be rejected if had forced asdcb1@NOTuaa.alaska.edu as the
from address.
OK, some more questions. Although it's imopssible to tell unless we
had access to the email servers of uaa, yahoo and design-pt.com, why do
they behave differently? Is this behavior built in or configured so?
does the email server have it's own internal dns client? ... yes, I
know it varies from server to server.

Dennis Byrne

----- Original Message -----
From: Arthur Corliss <acorliss@nevaeh-linux.org>
Date: Thursday, March 4, 2004 3:04 pm
Subject: Re: smtp questions

> On Thu, 4 Mar 2004, DENNIS BYRNE wrote:
>
> > Forcing "the sender's domain address [to] be resolvable " is
> definetly> a " simple anti-spam technique". I just spammed
> myself. Couldn't
> > yahoo stop a lot more spam by only accepting mail requests when
> a DNS
> > lookup of the domain of the sender address matches the source IP
> > address of the very packets that make up the email itself? What
> am I
> > missing?
>
> Keep in mind that larger entities on the net have separate inbound
> & outbound
> servers. The most you're going to want to do is make sure the
> connecting IP
> is in the same domain, but then you may irritate a lot of road
> warriors that
> may be funneling mail through local IPs, etc.
>
> --Arthur Corliss
> Bolverk's Lair -- http://arthur.corlissfamily.org/
> Digital Mages -- http://www.digitalmages.com/
> "Live Free or Die, the Only Way to Live" -- NH State Motto
>
>

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Received on Thu Mar 4 17:32:04 2004