[Pdns-users] rDNS error question

lonnie at outstep.com lonnie at outstep.com
Wed Jul 13 16:17:01 UTC 2005

Greeting All,

I have my PowerDNS installed and it seems to be working just fine,

My a home machine, I can do NSLOOKUP like:

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\lonnie>nslookup

Name:    mail.outstep.com

C:\Documents and Settings\lonnie>nslookup mail.outstep.com
DNS request timed out.
    timeout was 2 seconds.
Name:    mail.outstep.com


and it looks like the reverse DNS is working, but if I go to:


I get this error at the bottom of the page:

Reverse DNS entries for MX records ERROR:

The IP of one or more of your mail server(s) have no reverse DNS
(PTR) entries (if you see "Timeout" below, it may mean that your DNS
servers did not respond fast enough). RFC1912 2.1 says you should
have a reverse DNS for all your mail servers. It is strongly urged
that you have them, as many mailservers will not accept mail from
mailservers with no reverse DNS entry. You can double-check using
the 'Reverse DNS Lookup' tool at the DNSstuff site (it contacts your
servers in real time; the reverse DNS lookups in the DNS report use
our local caching DNS server). The problem MX records are: [No reverse DNS entry; 'Server Failure'
(check it)]


My PowerDNS records are:
 73.177.205.in-addr.arpa     SOA  PTR mail.peoplesquest.com  3600  PTR www.outstep.com        3600   PTR test.outstep.com       3600

 74.177.205.in-addr.arpa     SOA  PTR mail.peoplesquest.com  3600  PTR ns2.peoplesquest.net   3600

75.177.205.in-addr.arpa    SOA PTR  mail.outstep.com

outstep.com                 SOA
outstep.com                 NS  ns1.peoplesquest.net  3600
outstep.com                 NS  ns2.peoplesquest.net  3600
outstep.com                 MX  mail.outstep.com 10 3600
outstep.com                 MX  test.outstep.com 10 3600
www.outstep.com             A  3600
mail.outstep.com            A   3600
test.outstep.com            A   3600
peoplesquest.net            SOA
peoplesquest.net            NS  ns2.peoplesquest.net  3600
peoplesquest.net            NS  ns1.peoplesquest.net  3600
ns2.peoplesquest.net        A        3600
ns1.peoplesquest.net        A         3600

I just want to ensure that PoweDNS is working properly and that
maybe there is not a problem with my pdns.conf as well.

Has anyone experienced something like this?

I also read a message from someone on the list that has been using
PowerDNS in production environments with over 8-million entries
which is very impressive and I have to assume that they are doing
REVERSE DNS lookups as well.

Any help would be greatly appreciated.

Thanks everyone,

Lonnie Cumberland
OutStep Technologies Incorporated
CELL: 313-333-2935
FAX: 619-639-2888

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