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From: Gene Whitley on 22 Jan 2010 13:31
could this be caused by no SPF record?


"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.
>>>>
>>>>
>>>
>>
>

From: Ed Crowley [MVP] on 22 Jan 2010 16:25
It's probably caused by a bad reverse lookup record for your server.
--
Ed Crowley MVP
"There are seldom good technological solutions to behavioral problems."
..

"Gene Whitley" <pwhitley2(a)carolina.rr.com> wrote in message
news:DE125C28-2C18-4D74-A53E-F05EEEBFE689(a)microsoft.com...
> could this be caused by no SPF record?
>
>
> "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.
>>>>>
>>>>>
>>>>
>>>
>>
>

From: Rich Matheisen [MVP] on 22 Jan 2010 23:14
On Fri, 22 Jan 2010 13:21:46 -0500, "Gene Whitley"
<pwhitley2(a)carolina.rr.com> wrote:

>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.

Are you using the same IP address to send e-mail now as you did
before?

What name does your server send in the HELO/EHLO command? Does that
name agree with the name in the PTR record for the server's IP
address?
---
Rich Matheisen
MCSE+I, Exchange MVP
From: Craig on 24 Jan 2010 12:44
Are you using the same hostname/ip address that you had with your ex2003
server?
If so, check your Send Connector to make sure it matches the reverse DNS for
your ip address.

If not, then make sure whoever is hosting the reverse DNS has the records
that matches your Send Connector.

"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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