[69312] in North American Network Operators' Group
Re: Mailserver requirements
daemon@ATHENA.MIT.EDU (Arnold Nipper)
Mon Apr 5 17:54:40 2004
Date: Mon, 05 Apr 2004 23:53:15 +0200
From: Arnold Nipper <arnold@nipper.de>
To: Daniel Roesen <dr@cluenet.de>
Cc: NANOG <nanog@nanog.org>
In-Reply-To: <20040405234228.A13357@homebase.cluenet.de>
Errors-To: owner-nanog-outgoing@merit.edu
On 05.04.2004 23:42 Daniel Roesen wrote:
> On Mon, Apr 05, 2004 at 11:32:08PM +0200, Arnold Nipper wrote:
>
>>> I am surprised you don't have problems sending to AOL as well.
>>>They don't accept email from servers that do not have reverse addresses.
>>>I don't accept email from severs without reverse addressing.
>>
>>of course this server does have a reverse mapping. But this reverse
>>mapped doamin does not have an MX record.
>
>
> Does it have an A RR?
>
It also does have an A RR. And the forward mapping does also match the
IP address.
> Anyway... it's a heuristic which definately does give false positives.
> The only requirement is that IF a domain/host accepts mail there MUST be
> a postmaster@ address.
>
In this case the host *sends* mail ...
Arnold
