accanthonychavez.org
Date: Sun Aug 24 2003 - 15:03:02 CDT

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

On Sun, 24 Aug 2003 13:48:27 +0200 Magnus Bäck <magnusdsek.lth.se> wrote:
> On Sun, Aug 24, 2003 at 05:01:13AM -0600,
> accanthonychavez.org wrote:
>> -Queue ID- --Size-- ----Arrival Time---- -Sender/Recipient-------
>> B0B23266 3060 Sat Aug 16 16:42:32 MAILER-DAEMON
>> (connect to mybox.anthonychavez.org[192.168.4.34]: Connection refused)
>> AdministratorMYBOX.anthonychavez.org
>
> "Connection refused" means that Postfix could not even connect to
> port 25 on the destination host. Alas, this has nothing to do with
> your Received headers.

This isn't a validation of the originating IP/hostname by the recipient,
then? I guess that would sort of make sense, because if the recipient
were trying to validate that IP, I would receive no notice about it.

>> Also, I was advised to create CNAME records in my DNS zone file for
>> mybox and all the other machines in my LAN that could send email. This
>> cleared up most of the problems that were occuring when I first set up
>> my LAN. My ISP is recommending also creating PTR records for these
>> machines for reverse DNS. However, since mybox lives on my internal
>> LAN, I have my doubts if this will accomplish anything---will it?
>
> PTR records should always be present whenever there are A records, but
> adding PTR records to a local zone for your 192.168.4.0 network will of
> course not matter for the hosts you send mail to.

Well, what I was getting at is this: putting CNAMEs in my external zone
fixed the problem with MTAs verifying my hostname via forward DNS, but
should I expect any MTAs to do reverse DNS verification? The PTR
records would not resolve to my internal network (192.168.4.0) but
rather to an IP in the block that my ISP assigns.

--
Anthony Chavez http://www.anthonychavez.org/
mailto:accanthonychavez.org jabber:accjabber.anthonychavez.org

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.2 (Cygwin)

iD8DBQA/SRn7bZTbIaRBRXERAtlLAJ0aeVaAyvGk9zDoPj1BRLuZ1mwueACfQZFG
/3OVrqqVOo21KGJRSgoBV2I=
=KyE6
-----END PGP SIGNATURE-----

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]