DNS- Mail Issue

[Andre Lorenz]

Hi,

I've several debian etch servers with latest updates running. This
servers have  public IP-addresses.
on server a is my primary public DNS (YYY.Y.YYY.YYY) for serveral
Domains running. This DNS is also apporved and verified by DENIC /
INTERNIC / DTAG .....
on my second server with an other pub. IP (XXX.X.XXX.XXX) i've running a
qmail-server for all Domains.

There is following problem:
If i send to diffent domains mail, i'm getting sometimes for some
domains following error :

195.4.92.211 does not like recipient.
Remote host said: 550 inconsistent or no DNS PTR record for XXX.X.XXX.XXX (see RFC 1912 2.1)
Giving up on 195.4.92.211.

in this case it is freenet that is causing the problem.

i've already checked my dns-setup for typos, or inconsistent entries but
i cand find them. Does i need a special setup on ?
or could this be a qmail-problem.

Thanks for help.

Andre
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[Paul van der Vlis]

Andre Lorenz schreef:

> Hi,
>
> I've several debian etch servers with latest updates running. This
> servers have  public IP-addresses.
> on server a is my primary public DNS (YYY.Y.YYY.YYY) for serveral
> Domains running. This DNS is also apporved and verified by DENIC /
> INTERNIC / DTAG .....
> on my second server with an other pub. IP (XXX.X.XXX.XXX) i've running a
> qmail-server for all Domains.
>
> There is following problem:
> If i send to diffent domains mail, i'm getting sometimes for some
> domains following error :
>
> 195.4.92.211 does not like recipient.
> Remote host said: 550 inconsistent or no DNS PTR record for
> XXX.X.XXX.XXX (see RFC 1912 2.1)
> Giving up on 195.4.92.211.
>
> in this case it is freenet that is causing the problem.
>
> i've already checked my dns-setup for typos, or inconsistent entries but
> i cand find them. Does i need a special setup on ?
> or could this be a qmail-problem.

Hello Andre,

Is your reverse-DNS correct?

Try "dig -x yourip", you should get a name in the answer section. And if
you resolve this name, you should get your IP.

To give the IP a name, you can contact the owner of the IP-range.

With regards,
Paul van der Vlis.




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[mro2]

Andre Lorenz wrote:

> Hi,
>
> I've several debian etch servers with latest updates running. This
> servers have  public IP-addresses.
> on server a is my primary public DNS (YYY.Y.YYY.YYY) for serveral
> Domains running. This DNS is also apporved and verified by DENIC /
> INTERNIC / DTAG .....
> on my second server with an other pub. IP (XXX.X.XXX.XXX) i've running
> a qmail-server for all Domains.
>
> There is following problem:
> If i send to diffent domains mail, i'm getting sometimes for some
> domains following error :
>
> 195.4.92.211 does not like recipient.
> Remote host said: 550 inconsistent or no DNS PTR record for
> XXX.X.XXX.XXX (see RFC 1912 2.1)
> Giving up on 195.4.92.211.
>
> in this case it is freenet that is causing the problem.
>
> i've already checked my dns-setup for typos, or inconsistent entries
> but i cand find them. Does i need a special setup on ?
> or could this be a qmail-problem.
>
> Thanks for help.

Your DNS setup is not the problem. As far as I see you use a
"dialup"-type of IP address to send mail. With that you have a very good
chance of being blacklisted anyhow. Use the smarthost of your ISP to
send mail or ask them to configure a correct PTR record for your IP
address. Since it is not YOUR IP address, you cannot do anything and
also this has nothing to do with your local DNS, I hope that is clear...
(So what IS the PTR record anyway and why doesn't it match?? "dig -x <ip>")


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[Håkon Alstadheim]

Andre Lorenz wrote:

> Hi,
>
> I've several debian etch servers with latest updates running. This
> servers have  public IP-addresses.
> on server a is my primary public DNS (YYY.Y.YYY.YYY) for serveral
> Domains running. This DNS is also apporved and verified by DENIC /
> INTERNIC / DTAG .....
> on my second server with an other pub. IP (XXX.X.XXX.XXX) i've running
> a qmail-server for all Domains.
>
> There is following problem:
> If i send to diffent domains mail, i'm getting sometimes for some
> domains following error :
>
> 195.4.92.211 does not like recipient.
> Remote host said: 550 inconsistent or no DNS PTR record for
> XXX.X.XXX.XXX (see RFC 1912 2.1)
> Giving up on 195.4.92.211.
>
> in this case it is freenet that is causing the problem.
>
> i've already checked my dns-setup for typos, or inconsistent entries
> but i cand find them. Does i need a special setup on ?
> or could this be a qmail-problem.
>

Why are you hiding xxx.x.xxx.xxx ? If you had let us know, we could have
looked it up to check that we see the expected name when doing a reverse
lookup. Telling us the name by which your server introduces itself would
also be good.

If we assume that your server is 212.6.234.251, then you may have a
problem since the command  dig -x 212.6.234.251 gives no reply to me. If
you can you should set up a reverse domain and enter something like
mail.netsolution-net.de as a PTR record for your ip-address.

Strictly speaking having a server with no PTR record is not an error,
but A LOT of servers will not speak to you if you do not have a
(non-generic) ptr record for your machine.

If the server you are sending from is  212.6.249.100, then that is the
one that needs a PTR record.

To get the PTR lookup to work, you either need to get your provider to
enter in the correct names, or have authority for your ip-range
delegated to you. From the whois record, it looks like you need to
contact a company called "clearnet". Check the whois(1) command.



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[Andre Lorenz]

Andre Lorenz schrieb:

> Hi,
>
> I've several debian etch servers with latest updates running. This
> servers have  public IP-addresses.
> on server a is my primary public DNS (YYY.Y.YYY.YYY) for serveral
> Domains running. This DNS is also apporved and verified by DENIC /
> INTERNIC / DTAG .....
> on my second server with an other pub. IP (XXX.X.XXX.XXX) i've running
> a qmail-server for all Domains.
>
> There is following problem:
> If i send to diffent domains mail, i'm getting sometimes for some
> domains following error :
>
> 195.4.92.211 does not like recipient.
> Remote host said: 550 inconsistent or no DNS PTR record for
> XXX.X.XXX.XXX (see RFC 1912 2.1)
> Giving up on 195.4.92.211.
>
> in this case it is freenet that is causing the problem.
>
> i've already checked my dns-setup for typos, or inconsistent entries
> but i cand find them. Does i need a special setup on ?
> or could this be a qmail-problem.
>
> Thanks for help.
>
> Andre
> ____________
> Virus checked by G DATA AntiVirusKit
> Virus news: www.antiviruslab.com
>
>
>

Thx for your help.

I've just talked to my carrier, and he will setup a redirect for all
PTR-Requests to my DNS-Server.

Cheers
Andre
____________
Virus checked by G DATA AntiVirusKit
Virus news: www.antiviruslab.com



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