RE: rDNS - was [exim] looking for spam in Exim log file

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Author: Robert Cates
Date:  
To: exim-users
CC: Graeme Fowler
Subject: RE: rDNS - was [exim] looking for spam in Exim log file
>>As suggested elsewhere, you need to contact your ISP support team to
>>ask the to set the reverse DNS on 217.91.111.75 to something
>>meaningful, like "kormar.net" or "mail.kormar.net"


But that's why, or what I meant when I asked about rDNS being independent of
Domain Names. You see, I've got my physical server (host) setup as
mail.kormar.net, but I've got the Exim (4.43) configured with - domainlist
local_domains = localhost : kormar.net : kormar.org : kormar.de : @

So what (or how many rDNS entries) should I ask Deutsche Telekom AG to setup
for me, so I do not have this problem with any of the TLDs?

Thank you much!
Robert


-----Original Message-----
From: exim-users-bounces@??? [mailto:exim-users-bounces@exim.org]On
Behalf Of Graeme Fowler
Sent: Samstag, 30. Juli 2005 10:58
To: exim-users@???
Subject: Re: rDNS - was [exim] looking for spam in Exim log file


On Sat 30 Jul 2005 09:26:01 BST , Robert Cates <robert@???> wrote:
> Is rDNS independant of Domain Names?


In as much as there's no such thing as an rDNS "registrar", yes.

> I have one IP for my Gateway/Router and I'm hosting
> about 8 Domains right now by way of two (Dyn)DNS Services
> (though I'm not using the Dynamic part of their service).


Assuming you're talking about the IP your mail came from -
217.91.111.75 - this is a Deutsche Telekom AG range. You can find this
by doing:

# whois 217.91.111.75@???

You can find the nameservers for a given range by doing:

# dig 111.91.217.in-addr.arpa ns

Which in your case returns:

;; ANSWER SECTION:
111.91.217.in-addr.arpa. 86391  IN      NS      secondary007.dtag.net.
111.91.217.in-addr.arpa. 86391  IN      NS      pns.dtag.de.


Hrm... dtag.de? Deutsche Telekom AG. Again.

As suggested elsewhere, you need to contact your ISP support team to
ask the to set the reverse DNS on 217.91.111.75 to something
meaningful, like "kormar.net" or "mail.kormar.net".

Hope that helps

Graeme


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