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On 6 Jun 00, at 10:00, OK 2 NET - André Paulsberg wrote:
> > Ah. Since when is a mailserver requires to accept e-mails at its
> > reverse DNS name or IP? That's the problem; I have spoken to people
> > who never saw to e-mail; why? They don't accept at their RDNS or IP.
>
> AFAIK all mailserver are required to have an A record,
> they are also required to have an RDNS matching "this" A record.
> This A record then becomes one of the possible domains to reach the
> mailserver, which RFC 822 requires to have a postmaster@domain (domain
> being RDNS).
Where do you see this "domain being RDNS" part in the text
below?
AFAIK, there's no requirement in the RFC that a mailserver
accepts mail for anyone or from anyone.
[822 snip]
> This standard specifies a single, reserved mailbox address
> (local-part) which is to be valid at each site. Mail sent to
> that address is to be routed to a person responsible for the
> site's mail system or to a person with responsibility for general
> site operation. The name of the reserved local-part address is:
>
> Postmaster
Yes, local part. It's valid on my site, too, if you get the "domain"
right.
You know, my machine has several interfaces; DNS of some of
them is controlled by my ISP (because the IP is in their netblock).
There's no way for me to set up my mailserver to have a name of
each interface in its control/locals, and check daily whether the
ISP didn't change the reverse zone.
> so that "Postmaster@domain" is required to be valid.
I still fail to see "domain must be any RDNS for your computer you
can think of".
> There are surely more ways to get mail to these admins / postmasters,
> but telnet to port 25 and manually dropping a "rcpt to: <postmaster>"
> is far to much to ask from a normal person trying to contact a
> postmaster.
ORBS tester (notifier) is far from being "normal person". After all, a
normal person wouldn't know how to set up and run such a service.
Or doesn't ORBS know either?
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