[Info-vax] Decuserve.org - Anyone know why it's down?

[Bill Gunshannon]

In article <54ac1590$0$42769$c3e8da3$9deca2c3 at news.astraweb.com>,
	JF Mezei <jfmezei.spamnot at vaxination.ca> writes:
> On 15-01-06 10:12, Bill Gunshannon wrote:
> 
>> That is what we are talking about.  The A and PTR must match or the
>> system is mis-configured or spoofing and mail should not be accepted.
> 
> Nop.  Multiple A records may point to a single PTR 

A records don't point to any PTR Record.  They are totally different
entities.  An A record returns an IP Address for a given hostname.
A PTR Record returns a name for a given IP Address.  They are not
in any way tied to each other, thus the whole problem here.

>                                                    which means the one
> PTR for an IP address may not necessarily point to the host name being
> used to send email. 

In which case, as has been said repeatedly, my email server and many others
are not going to accept email from a machine that may be trying to spoof
some other machine.  And that is not just for anti-SPAM as there are a lot
of more serious reasons for trying to spoof who you are.

>                     Consider multi-homed email server that handles many
> domains.
 
Mail domains have nothing to do with the name or address of the MTA.  Not
sure what you even mean by "multi-homed email server" as there is nothing
about email that would require multi-homing.  Unless, as usual, you are
misusing terms because you really don't know what you are talking about.

bill
 

-- 
Bill Gunshannon          |  de-moc-ra-cy (di mok' ra see) n.  Three wolves
billg999 at cs.scranton.edu |  and a sheep voting on what's for dinner.
University of Scranton   |
Scranton, Pennsylvania   |         #include <std.disclaimer.h>