No it isn't.
Reverse DNS for 172.16.2.103
Generated by www.DNSstuff.com
Country: [Private IP]
Preparation:
The reverse DNS entry for an IP is found by reversing the IP, adding it to
"in-addr.arpa", and looking up the PTR record.
So, the reverse DNS entry for 172.16.2.103 is found by looking up the PTR
record for
103.2.16.172.in-addr.arpa.
All DNS requests start by asking the root servers, and they let us know
what to do next.
See How Reverse DNS Lookups Work for more information.
How I am searching:
Asking i.root-servers.net for 103.2.16.172.in-addr.arpa PTR record:
i.root-servers.net says to go to henna.arin.net. (zone:
172.in-addr.arpa.)
Asking henna.arin.net. for 103.2.16.172.in-addr.arpa PTR record:
henna.arin.net says to go to BLACKHOLE-2.IANA.ORG. (zone:
16.172.in-addr.arpa.)
Asking BLACKHOLE-2.IANA.ORG. for 103.2.16.172.in-addr.arpa PTR record:
Reports that no PTR records exist.
Answer:
No PTR records exist for 172.16.2.103. [Neg TTL=604800 seconds]
Details:
BLACKHOLE-2.IANA.ORG. (an authoritative nameserver for
16.172.in-addr.arpa., which is in charge of the reverse DNS for 172.16.2.103)
says that there are no PTR records for 172.16.2.103.
To get reverse DNS set up for 172.16.2.103, you need to speak to your
Internet provider. You could also
check with [EMAIL PROTECTED]., who is in charge of the
16.172.in-addr.arpa. zone.
Note that all Internet accessible hosts are expected to have a reverse DNS
entry (per RFC1912 2.1),
At 09:33 AM 5/5/2004 -0700, you wrote:
We have our own DNS servers and are providing reverse entries. Our primary
email server is enterprise.nezperce.org Is there anything in that which AOL
would block?
Jim Matuska Jr.
Computer Tech II
CCNA
Nez Perce Tribe
Information Systems
[EMAIL PROTECTED]
----- Original Message -----
From: "Stan Buck" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, May 05, 2004 9:12 AM
Subject: Re: [Declude.Virus] OT Problems with emails to aol.com and
earthlink.net addresses
AOL recently instituted a new policy of not accepting mail from servers
with
dynamic IPs. As part of that, they do a reverse DNS and look for "dsl",
"adsl","dyn", etc and block your mail if one of them shows up. We had
"dsl"
in ours, given to us by our ISP, and even though it's a business DSL line
with a fixed IP, they wouldn't take our mail (just piled up in the queue
and
generated the message you see). We had to contact our ISP and change our
name.
----- Original Message -----
From: "Jim Matuska" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, May 05, 2004 12:03 PM
Subject: [Declude.Virus] OT Problems with emails to aol.com and
earthlink.net addresses
This is a little off topic but maybe someone else on this list has seen
this. Recently every time anyone tries to send an email to an aol account
they get a message like the following:
Delivery failed 20 attempts: [EMAIL PROTECTED]
and for earthlink:
Unknown user: [EMAIL PROTECTED]
Additional RCPT TO generated following response:
550 relaying to <[EMAIL PROTECTED]> prohibited by administrator
this seems to be happening whenever anyone responds to an AOL or Earthlink
Account, the earthlink one is really weird to me since if a user is
unknown
why would you get a relaying prohibited message, especially since this
happens when our mailserver connects to earthlink's, I didn't think that
would create a relay problem.
We are running the Declude 1.79 and Imail 8.10 (With HF1, and HF2). Could
this be related to the version of Imail we are running or is there just a
problem with aol and earthlink servers? Any thoughts?
Jim Matuska Jr.
Computer Tech II
CCNA
Nez Perce Tribe
Information Systems
[EMAIL PROTECTED]
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