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RDNS failed in email full header

Last response: in Windows 2000/NT
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Anonymous
January 6, 2005 5:52:10 PM

Archived from groups: microsoft.public.win2000.dns (More info?)

Why do our incoming email messages have a "RDNS failed" in the header? What can I do to fix this?


---------example-------------
Microsoft Mail Internet Headers Version 2.0
Received: from senderdomain ([senderIPaddress] RDNS failed) by emailservername with Microsoft
SMTPSVC(5.0.2195.6713);


Thank you.

Roy Avery



--
Remove "nospam_" from my email address to email me.
Anonymous
January 6, 2005 6:08:45 PM

Archived from groups: microsoft.public.win2000.dns (More info?)

It means that the mail server tried to do a reverse DNS lookup on the IP
address and there was no PTR record published. For mail servers it is
important that you publish a reverse entry that matches the forward A record
you have published in your zone. Please read RFC 2505 and then RFC 2317.

You can also review my PowerPoint slide deck at:
http://www.sfntug.org/index.php?option=com_weblinks&tas...
if you want more details about what folks are doing as anti-spam techniques.

So, in a nutshell, publish a Pointer Record (PTR) in the reverse file and
you should be good to go.

Regards,
Ed Horley
Microsoft MVP Server-Networking


"Roy Avery" <roy_avery@nospam_cmwlaw.net> wrote in message
news:e4Ki0NE9EHA.3708@TK2MSFTNGP14.phx.gbl...
> Why do our incoming email messages have a "RDNS failed" in the header?
> What can I do to fix this?
>
>
> ---------example-------------
> Microsoft Mail Internet Headers Version 2.0
> Received: from senderdomain ([senderIPaddress] RDNS failed) by
> emailservername with Microsoft SMTPSVC(5.0.2195.6713);
>
>
> Thank you.
>
> Roy Avery
>
>
>
> --
> Remove "nospam_" from my email address to email me.
>
Anonymous
January 6, 2005 6:14:01 PM

Archived from groups: microsoft.public.win2000.dns (More info?)

Thanks Ed.

I'll check out the presentation right away. I have a quick question though, did the RDNS fail
against the sender's IP because the recipient did not have a PTR record, or because the sender did
not have a PTR record?

---------example-------------
Microsoft Mail Internet Headers Version 2.0
Received: from sender_domain ([sender_IPaddress] RDNS failed) by
recipient_email_servername with Microsoft SMTPSVC(5.0.2195.6713);



"Ed Horley" <no-spamed-usergroups1@yahoo.com> wrote in message
news:u1zbVTE9EHA.1404@TK2MSFTNGP11.phx.gbl...
> It means that the mail server tried to do a reverse DNS lookup on the IP address and there was no
> PTR record published. For mail servers it is important that you publish a reverse entry that
> matches the forward A record you have published in your zone. Please read RFC 2505 and then RFC
> 2317.
>
> You can also review my PowerPoint slide deck at:
> http://www.sfntug.org/index.php?option=com_weblinks&tas...
> if you want more details about what folks are doing as anti-spam techniques.
>
> So, in a nutshell, publish a Pointer Record (PTR) in the reverse file and you should be good to
> go.
>
> Regards,
> Ed Horley
> Microsoft MVP Server-Networking
>
>
> "Roy Avery" <roy_avery@nospam_cmwlaw.net> wrote in message
> news:e4Ki0NE9EHA.3708@TK2MSFTNGP14.phx.gbl...
>> Why do our incoming email messages have a "RDNS failed" in the header? What can I do to fix this?
>>
>>
>> ---------example-------------
>> Microsoft Mail Internet Headers Version 2.0
>> Received: from senderdomain ([senderIPaddress] RDNS failed) by emailservername with Microsoft
>> SMTPSVC(5.0.2195.6713);
>>
>>
>> Thank you.
>>
>> Roy Avery
>>
>>
>>
>> --
>> Remove "nospam_" from my email address to email me.
>>
>
>
Related resources
Anonymous
January 6, 2005 7:24:20 PM

Archived from groups: microsoft.public.win2000.dns (More info?)

It looks like it was because the sender did not have a PTR record.

Regardless, you should make sure you have your set up! It will help you
avoid issues long terms with sending and receiving e-mail from your MTA in
the future.

Regards,
Ed Horley
Microsoft MVP Server-Networking

"Roy Avery" <roy_avery@nospam_cmwlaw.net> wrote in message
news:o MUI$XE9EHA.1404@TK2MSFTNGP11.phx.gbl...
> Thanks Ed.
>
> I'll check out the presentation right away. I have a quick question
> though, did the RDNS fail against the sender's IP because the recipient
> did not have a PTR record, or because the sender did not have a PTR
> record?
>
> ---------example-------------
> Microsoft Mail Internet Headers Version 2.0
> Received: from sender_domain ([sender_IPaddress] RDNS failed) by
> recipient_email_servername with Microsoft SMTPSVC(5.0.2195.6713);
>
>
>
> "Ed Horley" <no-spamed-usergroups1@yahoo.com> wrote in message
> news:u1zbVTE9EHA.1404@TK2MSFTNGP11.phx.gbl...
>> It means that the mail server tried to do a reverse DNS lookup on the IP
>> address and there was no PTR record published. For mail servers it is
>> important that you publish a reverse entry that matches the forward A
>> record you have published in your zone. Please read RFC 2505 and then
>> RFC 2317.
>>
>> You can also review my PowerPoint slide deck at:
>> http://www.sfntug.org/index.php?option=com_weblinks&tas...
>> if you want more details about what folks are doing as anti-spam
>> techniques.
>>
>> So, in a nutshell, publish a Pointer Record (PTR) in the reverse file and
>> you should be good to go.
>>
>> Regards,
>> Ed Horley
>> Microsoft MVP Server-Networking
>>
>>
>> "Roy Avery" <roy_avery@nospam_cmwlaw.net> wrote in message
>> news:e4Ki0NE9EHA.3708@TK2MSFTNGP14.phx.gbl...
>>> Why do our incoming email messages have a "RDNS failed" in the header?
>>> What can I do to fix this?
>>>
>>>
>>> ---------example-------------
>>> Microsoft Mail Internet Headers Version 2.0
>>> Received: from senderdomain ([senderIPaddress] RDNS failed) by
>>> emailservername with Microsoft SMTPSVC(5.0.2195.6713);
>>>
>>>
>>> Thank you.
>>>
>>> Roy Avery
>>>
>>>
>>>
>>> --
>>> Remove "nospam_" from my email address to email me.
>>>
>>
>>
>
>
Anonymous
January 6, 2005 7:49:12 PM

Archived from groups: microsoft.public.win2000.dns (More info?)

Thank you very much.




"Ed Horley" <no-spamed-usergroups1@yahoo.com> wrote in message
news:%23hdyl9E9EHA.3708@TK2MSFTNGP14.phx.gbl...
> It looks like it was because the sender did not have a PTR record.
>
> Regardless, you should make sure you have your set up! It will help you avoid issues long terms
> with sending and receiving e-mail from your MTA in the future.
>
> Regards,
> Ed Horley
> Microsoft MVP Server-Networking
>
> "Roy Avery" <roy_avery@nospam_cmwlaw.net> wrote in message
> news:o MUI$XE9EHA.1404@TK2MSFTNGP11.phx.gbl...
>> Thanks Ed.
>>
>> I'll check out the presentation right away. I have a quick question though, did the RDNS fail
>> against the sender's IP because the recipient did not have a PTR record, or because the sender
>> did not have a PTR record?
>>
>> ---------example-------------
>> Microsoft Mail Internet Headers Version 2.0
>> Received: from sender_domain ([sender_IPaddress] RDNS failed) by
>> recipient_email_servername with Microsoft SMTPSVC(5.0.2195.6713);
>>
>>
>>
>> "Ed Horley" <no-spamed-usergroups1@yahoo.com> wrote in message
>> news:u1zbVTE9EHA.1404@TK2MSFTNGP11.phx.gbl...
>>> It means that the mail server tried to do a reverse DNS lookup on the IP address and there was
>>> no PTR record published. For mail servers it is important that you publish a reverse entry that
>>> matches the forward A record you have published in your zone. Please read RFC 2505 and then RFC
>>> 2317.
>>>
>>> You can also review my PowerPoint slide deck at:
>>> http://www.sfntug.org/index.php?option=com_weblinks&tas...
>>> if you want more details about what folks are doing as anti-spam techniques.
>>>
>>> So, in a nutshell, publish a Pointer Record (PTR) in the reverse file and you should be good to
>>> go.
>>>
>>> Regards,
>>> Ed Horley
>>> Microsoft MVP Server-Networking
>>>
>>>
>>> "Roy Avery" <roy_avery@nospam_cmwlaw.net> wrote in message
>>> news:e4Ki0NE9EHA.3708@TK2MSFTNGP14.phx.gbl...
>>>> Why do our incoming email messages have a "RDNS failed" in the header? What can I do to fix
>>>> this?
>>>>
>>>>
>>>> ---------example-------------
>>>> Microsoft Mail Internet Headers Version 2.0
>>>> Received: from senderdomain ([senderIPaddress] RDNS failed) by emailservername with Microsoft
>>>> SMTPSVC(5.0.2195.6713);
>>>>
>>>>
>>>> Thank you.
>>>>
>>>> Roy Avery
>>>>
>>>>
>>>>
>>>> --
>>>> Remove "nospam_" from my email address to email me.
>>>>
>>>
>>>
>>
>>
>
>
January 17, 2005 6:55:41 PM

Archived from groups: microsoft.public.win2000.dns (More info?)

If you have Trend IMSS with SPS with reverse lookup checking configured. It
inserts "RDNS Failed" into the header.

Cheers
Simon
---
"Roy Avery" <roymtbkr@nospam_rocketmail.com> wrote in message
news:o X4MLNF9EHA.824@TK2MSFTNGP11.phx.gbl...
> Thank you very much.
>
>
>
>
> "Ed Horley" <no-spamed-usergroups1@yahoo.com> wrote in message
> news:%23hdyl9E9EHA.3708@TK2MSFTNGP14.phx.gbl...
>> It looks like it was because the sender did not have a PTR record.
>>
>> Regardless, you should make sure you have your set up! It will help you
>> avoid issues long terms with sending and receiving e-mail from your MTA
>> in the future.
>>
>> Regards,
>> Ed Horley
>> Microsoft MVP Server-Networking
>>
>> "Roy Avery" <roy_avery@nospam_cmwlaw.net> wrote in message
>> news:o MUI$XE9EHA.1404@TK2MSFTNGP11.phx.gbl...
>>> Thanks Ed.
>>>
>>> I'll check out the presentation right away. I have a quick question
>>> though, did the RDNS fail against the sender's IP because the recipient
>>> did not have a PTR record, or because the sender did not have a PTR
>>> record?
>>>
>>> ---------example-------------
>>> Microsoft Mail Internet Headers Version 2.0
>>> Received: from sender_domain ([sender_IPaddress] RDNS failed) by
>>> recipient_email_servername with Microsoft SMTPSVC(5.0.2195.6713);
>>>
>>>
>>>
>>> "Ed Horley" <no-spamed-usergroups1@yahoo.com> wrote in message
>>> news:u1zbVTE9EHA.1404@TK2MSFTNGP11.phx.gbl...
>>>> It means that the mail server tried to do a reverse DNS lookup on the
>>>> IP address and there was no PTR record published. For mail servers it
>>>> is important that you publish a reverse entry that matches the forward
>>>> A record you have published in your zone. Please read RFC 2505 and
>>>> then RFC 2317.
>>>>
>>>> You can also review my PowerPoint slide deck at:
>>>> http://www.sfntug.org/index.php?option=com_weblinks&tas...
>>>> if you want more details about what folks are doing as anti-spam
>>>> techniques.
>>>>
>>>> So, in a nutshell, publish a Pointer Record (PTR) in the reverse file
>>>> and you should be good to go.
>>>>
>>>> Regards,
>>>> Ed Horley
>>>> Microsoft MVP Server-Networking
>>>>
>>>>
>>>> "Roy Avery" <roy_avery@nospam_cmwlaw.net> wrote in message
>>>> news:e4Ki0NE9EHA.3708@TK2MSFTNGP14.phx.gbl...
>>>>> Why do our incoming email messages have a "RDNS failed" in the header?
>>>>> What can I do to fix this?
>>>>>
>>>>>
>>>>> ---------example-------------
>>>>> Microsoft Mail Internet Headers Version 2.0
>>>>> Received: from senderdomain ([senderIPaddress] RDNS failed) by
>>>>> emailservername with Microsoft SMTPSVC(5.0.2195.6713);
>>>>>
>>>>>
>>>>> Thank you.
>>>>>
>>>>> Roy Avery
>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Remove "nospam_" from my email address to email me.
>>>>>
>>>>
>>>>
>>>
>>>
>>
>>
>
>
!