Reverse DNS not correct

I want to thank you for your expertise in all issues in these forums. I have searched for similar issues, but couldn't find one that helped. Have tried all I know.

I am running ubuntu dapper drake set up using the perfect setup. Only change was to add another IP address to the system. Installed ISPConfig and am up and running with minimal email. I have configured DNS so I am authoritative for my domain, imaple.net. When users email AOL addresses (of all things), mail is rejected, with this in mail.log:

Dec 12 07:24:36 mr01 postfix/smtp[18147]: 1C58A1C5951: to=<[email protected]>, relay=mailin-01.mx.aol.com[205.188.156.185], delay=4, status=bounced (host mailin-01.mx.aol.com[205.188.156.185] said: 554-: (RLY:CH) http://postmaster.info.aol.com/errors/554rlych.html 554 TRANSACTION FAILED (in reply to end of DATA command))

AOL reverse DNS tool says:
Reverse No PTR but got:
194.238.45.12.in-addr.arpa. 172800 IN CNAME 194.192/27.238.45.12.in-addr.arpa.

I'm sure it's something easy, but can't figure out what I am missing.
Thanx for the help.

 

Thanx for the quick reply.

Maybe I'm missing something here. I am a startup ISP, so I have my own mailservers, and I believe I shouldn't have to relay through others. I have a T-1, not cable or DSL (If they were available, I wouldn't be doing this!!), with a /27. All other email, or at least all I've been able to track, goes through.

Thanx again.

 

What's the output when you run

Code:

dig -x 1.2.3.4

where 1.2.3.4 is your IP address?

 

Here's the output:

; <<>> DiG 9.3.2 <<>> -x 12.45.238.194
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 58508
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 2, ADDITIONAL: 2

;; QUESTION SECTION:
;194.238.45.12.in-addr.arpa. IN PTR

;; ANSWER SECTION:
194.238.45.12.in-addr.arpa. 86400 IN PTR imaple.net.
194.238.45.12.in-addr.arpa. 86400 IN PTR ns1.imaple.net.
194.238.45.12.in-addr.arpa. 86400 IN PTR www.imaple.net.
194.238.45.12.in-addr.arpa. 86400 IN PTR mr01.imaple.net.

;; AUTHORITY SECTION:
238.45.12.in-addr.arpa. 86400 IN NS ns2.imaple.net.
238.45.12.in-addr.arpa. 86400 IN NS ns1.imaple.net.

;; ADDITIONAL SECTION:
ns1.imaple.net. 86400 IN A 12.45.238.194
ns2.imaple.net. 86400 IN A 12.45.238.195

;; Query time: 40 msec
;; SERVER: 12.45.238.194#53(12.45.238.194)
;; WHEN: Thu Dec 14 17:43:19 2006
;; MSG SIZE rcvd: 187

This is run from my server. Is that what you wanted?

Thanx again!!

 

This is what I get:

Code:

mh1:~# dig -x 12.45.238.194

; <<>> DiG 9.2.1 <<>> -x 12.45.238.194
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 17444
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;194.238.45.12.in-addr.arpa.    IN      PTR

;; ANSWER SECTION:
[B][COLOR="Red"]194.238.45.12.in-addr.arpa. 86400 IN    CNAME   194.192/27.238.45.12.in-addr.arpa.[/COLOR][/B]

;; Query time: 409 msec
;; SERVER: 81.169.163.104#53(81.169.163.104)
;; WHEN: Fri Dec 15 13:43:05 2006
;; MSG SIZE  rcvd: 69

This looks strange for sure.
You should contact the support of the ISP who gave you the IP address.

 

After much hassle with my bandwidth supplier, I had to manually insert PTRs for 194.192/27. This works now. I have cleaned up other loose ends, thanx to help from dnsreports and Cricket Liu. The last issue I have is that it seems postfix is using my second ip instead of my first. Email headers show the second address, instead of my original. I configured the Perfect Ubuntu 6.06 and ISPConfig and manually added the second IP. It is actually the same machine, just a second IP. A portion of an email header from my domain to another domain follows:

X-Barracuda-Connect: ns2.imaple.net[x.x.x.195]
X-Barracuda-Start-Time: 1167509606
Received: from imaple.net (ns2.imaple.net [x.x.x.195])

My primary IP is x.x.x.194. You can see above that the second IP is just for my second name server. All entries in ISPConfig are for x.x.x.194. The only one for x.x.x.195 is ns2.imaple.net.

Anyway, I believe this is causing 'Relaying denied' errors, in particular when sending to AOL, because imaple.net resides at x.x.x.194.

Can I easily change this? Where do I do it?

Thanx many times over for your help.

 

Here's a typical bounce message from AOL:

Reporting-MTA: dns; imaple.net
X-Postfix-Queue-ID: CF3EF1C5979
X-Postfix-Sender: rfc822; [email protected]
Arrival-Date: Sat, 30 Dec 2006 16:21:01 -0500 (EST)

Final-Recipient: rfc822; [email protected]
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; host emr-d01.mx.aol.com[205.188.159.2] said: 550
5.7.1 <[email protected]>... Relaying denied (in reply to RCPT
TO command)

Thanx again!!