[CentOS] help from community

Thu Apr 12 12:24:19 UTC 2012
Prabhpal S. Mavi <prabhpal at digital-infotech.net>

Hi JD,

Thanks for your response,

i am sure, it is some problem where you tried to resolve from. There is
PTR for the host and it exists in my own authoritative DNS server. i tried
to dig using through google DNS as well. Result shows that PTR is there.

[root at mailer mailer]# dig @8.8.8.8 -x 41.211.25.193

; <<>> DiG 9.7.3-P3-RedHat-9.7.3-8.P3.el6_2.2 <<>> @8.8.8.8 -x 41.211.25.193
; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 48506
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

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

;; ANSWER SECTION:
193.25.211.41.in-addr.arpa. 10800 IN    PTR     mail.digital-infotech.net.

;; Query time: 255 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Apr 12 12:08:14 2012
;; MSG SIZE  rcvd: 83

Thanks / Regards
Prabhpal

> From: Prabhpal S. Mavi <prabhpal at digital-infotech.net>
>
>> Sender address rejected: unverified address:
>> host mail.digital-infotech.net[41.211.25.193]
>> said: 450 4.7.1 Client host rejected: cannot find your hostname,
>> [205.234.223.198]
>
> Is this the issue...?
> $ host 41.211.25.193
> 193.25.211.41.in-addr.arpa has no PTR record
>
> JD
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Thanks / Regards
Prabhpal S. Mavi