also .. mx records do not indicate whether a server is passing spam
along or not ...

this is a silly way to try and fight spam  ..

they should be using some more modern methods: intent analysis,
fingerprinting, baysesian algorithms, spamassin type scoring, RBL's, etc
etc ...

 

-----Original Message-----
From: LISTSERV list owners' forum [mailto:[log in to unmask]]
On Behalf Of Jasper van Beusekom
Sent: Thursday, June 23, 2005 1:41 PM
To: [log in to unmask]
Subject: Re: earthlink problems

> It makes sence for all 'legit' email servers to have MX entries.  This

> would reduce some 'small' load on the DNS system if outbound email 
> servers didn't have to do multiple DNS requests to find a host.

That's not true.
If you do an MX request it would return something like this:

  # host -t mx peach.ease.lsoft.com
  peach.ease.lsoft.com mail is handled by 10 peach.ease.lsoft.com.

Then you would still need to do an A request to find the IP address of
the given host.

Jasper