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From: Gene Whitley on 21 Jan 2010 23:19
We just transitioned from Exchange 2003 to Exchange 2010. On the 2003 box
we had enabled the reverse DNS lookup setting. It allowed us to send email
to certain domains that did a reverse lookup. Now since we moved to 2010,
we are back in the same boat as before. Can someone tell me how to enable
DNS reverse lookup on a single Exchange 2010 server.

Yes we have a PTR from our ISP BUT we are still getting emails bounced.


From: Ed Crowley [MVP] on 22 Jan 2010 00:07
Enabling reverse lookup on your server helps control spam sent to you, not
mail you send out.

I don't believe Exchange provides reverese DNS lookup blocking natively.
--
Ed Crowley MVP
"There are seldom good technological solutions to behavioral problems."
..

"Gene Whitley" <pwhitley2(a)carolina.rr.com> wrote in message
news:7D32D47D-B483-40F8-9131-919D500DAF5E(a)microsoft.com...
> We just transitioned from Exchange 2003 to Exchange 2010. On the 2003 box
> we had enabled the reverse DNS lookup setting. It allowed us to send
> email to certain domains that did a reverse lookup. Now since we moved to
> 2010, we are back in the same boat as before. Can someone tell me how to
> enable DNS reverse lookup on a single Exchange 2010 server.
>
> Yes we have a PTR from our ISP BUT we are still getting emails bounced.
>
>

From: Gene Whitley on 22 Jan 2010 00:15
We're in a bit of a jam then.

There were no problems with sending to these domains under Exchange 2003,
now we can't send to them. I'm stumped on what would be causing this and
how to resolve it.


"Ed Crowley [MVP]" <curspice(a)nospam.net> wrote in message
news:%23YXNEDymKHA.976(a)TK2MSFTNGP02.phx.gbl...
> Enabling reverse lookup on your server helps control spam sent to you, not
> mail you send out.
>
> I don't believe Exchange provides reverese DNS lookup blocking natively.
> --
> Ed Crowley MVP
> "There are seldom good technological solutions to behavioral problems."
> .
>
> "Gene Whitley" <pwhitley2(a)carolina.rr.com> wrote in message
> news:7D32D47D-B483-40F8-9131-919D500DAF5E(a)microsoft.com...
>> We just transitioned from Exchange 2003 to Exchange 2010. On the 2003
>> box we had enabled the reverse DNS lookup setting. It allowed us to send
>> email to certain domains that did a reverse lookup. Now since we moved
>> to 2010, we are back in the same boat as before. Can someone tell me how
>> to enable DNS reverse lookup on a single Exchange 2010 server.
>>
>> Yes we have a PTR from our ISP BUT we are still getting emails bounced.
>>
>>
>

From: Ed Crowley [MVP] on 22 Jan 2010 08:44
You could start by posting an NDR.
--
Ed Crowley MVP
"There are seldom good technological solutions to behavioral problems."
..

"Gene Whitley" <pwhitley2(a)carolina.rr.com> wrote in message
news:ul6c0HymKHA.4792(a)TK2MSFTNGP04.phx.gbl...
> We're in a bit of a jam then.
>
> There were no problems with sending to these domains under Exchange 2003,
> now we can't send to them. I'm stumped on what would be causing this and
> how to resolve it.
>
>
> "Ed Crowley [MVP]" <curspice(a)nospam.net> wrote in message
> news:%23YXNEDymKHA.976(a)TK2MSFTNGP02.phx.gbl...
>> Enabling reverse lookup on your server helps control spam sent to you,
>> not mail you send out.
>>
>> I don't believe Exchange provides reverese DNS lookup blocking natively.
>> --
>> Ed Crowley MVP
>> "There are seldom good technological solutions to behavioral problems."
>> .
>>
>> "Gene Whitley" <pwhitley2(a)carolina.rr.com> wrote in message
>> news:7D32D47D-B483-40F8-9131-919D500DAF5E(a)microsoft.com...
>>> We just transitioned from Exchange 2003 to Exchange 2010. On the 2003
>>> box we had enabled the reverse DNS lookup setting. It allowed us to
>>> send email to certain domains that did a reverse lookup. Now since we
>>> moved to 2010, we are back in the same boat as before. Can someone tell
>>> me how to enable DNS reverse lookup on a single Exchange 2010 server.
>>>
>>> Yes we have a PTR from our ISP BUT we are still getting emails bounced.
>>>
>>>
>>
>

From: Gene Whitley on 22 Jan 2010 13:21
we get the following:

Primary target IP address responded with 554.5.7.1 connection refused. IP
name lookup failed for <ip address> attempted failover to alternate host,
but that did not succeed.


"Ed Crowley [MVP]" <curspice(a)nospam.net> wrote in message
news:u8ydwj2mKHA.5696(a)TK2MSFTNGP04.phx.gbl...
> You could start by posting an NDR.
> --
> Ed Crowley MVP
> "There are seldom good technological solutions to behavioral problems."
> .
>
> "Gene Whitley" <pwhitley2(a)carolina.rr.com> wrote in message
> news:ul6c0HymKHA.4792(a)TK2MSFTNGP04.phx.gbl...
>> We're in a bit of a jam then.
>>
>> There were no problems with sending to these domains under Exchange 2003,
>> now we can't send to them. I'm stumped on what would be causing this and
>> how to resolve it.
>>
>>
>> "Ed Crowley [MVP]" <curspice(a)nospam.net> wrote in message
>> news:%23YXNEDymKHA.976(a)TK2MSFTNGP02.phx.gbl...
>>> Enabling reverse lookup on your server helps control spam sent to you,
>>> not mail you send out.
>>>
>>> I don't believe Exchange provides reverese DNS lookup blocking natively.
>>> --
>>> Ed Crowley MVP
>>> "There are seldom good technological solutions to behavioral problems."
>>> .
>>>
>>> "Gene Whitley" <pwhitley2(a)carolina.rr.com> wrote in message
>>> news:7D32D47D-B483-40F8-9131-919D500DAF5E(a)microsoft.com...
>>>> We just transitioned from Exchange 2003 to Exchange 2010. On the 2003
>>>> box we had enabled the reverse DNS lookup setting. It allowed us to
>>>> send email to certain domains that did a reverse lookup. Now since we
>>>> moved to 2010, we are back in the same boat as before. Can someone
>>>> tell me how to enable DNS reverse lookup on a single Exchange 2010
>>>> server.
>>>>
>>>> Yes we have a PTR from our ISP BUT we are still getting emails bounced.
>>>>
>>>>
>>>
>>
>

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