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EXCHANGE 2003 - Conditional Relay To Specific Domains

We are having some connectivity issues sending to a few specific domains (long story about the local ISP)

Bottom line is there a 3 companies that cannot send email to each other as they are all part of a /24 block from the same ISP.

So my idea, is to set up a conditional smart relay.

I cannot recall if I need a new connector, etc.

thx
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yostnet
Asked:
yostnet
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3 Solutions
 
Glen KnightCommented:
you just setup an SMTP Connector with the address space of the domain you want to use that connector.

If it's more than one domain then you will need to setup one for each domain.
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BusbarSolutions ArchitectCommented:
you can configure an SMTP connector with conditional relay, but the problem do they have the ability to connect directly.
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yostnetAuthor Commented:
I found this -

http://www.amset.info/exchange/smtp-connector.asp

Looks like I can add multiple domains under the address space | not really that big of a deal as I only have a couple of domains to deal with.
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Glen KnightCommented:
if you are sending them all to the same place then yes you can use a single connector.  if not then you will need individual ones :)
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Alan HardistyCo-OwnerCommented:
Here is the MS article for how to configure an SMTP Connector:

http://support.microsoft.com/kb/265293

Just add the domain names for the problem domains to the Scope and make sure you specify a Smarthost - usually your ISP's mail server.

Alan
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yostnetAuthor Commented:
busbar -

no they do not | as I had mentioned, the ISP cannot figure out why they are blocking the traffic on their /24 |  
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BusbarSolutions ArchitectCommented:
so how the conditional forwarding will help here.
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Glen KnightCommented:
presumably they will be sent via a smarthost?
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yostnetAuthor Commented:
we can send email to everybody except for a couple of domains |

the ISP cannot figure this out and we are tired of waiting.

it so happens to be that I have 3 customers that use the same ISP |

all of a sudden they have been unable to send email to each other.  

so instead of waiting for the ISP to figure this out, I am going to use this connector so that I can use a relay service to send the email to and they can deliver it.


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Alan HardistyCo-OwnerCommented:
Please have a read of my article to make sure you are configured properly (RFC Compliant):

http://www.experts-exchange.com/Software/Server_Software/Email_Servers/A_2427-Problems-sending-mail-to-one-or-more-external-domains.html

If you like - please post your domain name - which Demazter and I can obscure for you to protect your identity - this will allow us to check for you and we might spot what your ISP can't spot!!
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Glen KnightCommented:
perfect, then create a SMTP connector with the address spaces you want and forward it to the smarthost :)
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yostnetAuthor Commented:
thx for the help -
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