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MS Exchange 2007 - 3rd party application

Posted on 2013-12-11
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Last Modified: 2013-12-29
Hello everyone,

We have a third party application that runs on a server external to our organization. This application needs to send emails from a mailbox on our Exchange 2007 server, so that the emails going out appear to be coming from this email address and any bounce backs are routed back to the third party application on the external server so that they can deal with it.
 
Is there a way that we can accomplish this? If so, how? I presume it has something to do with creating a new receive connector and specifying the external server’s IP address as the only server allowed to do this. I’m just uncertain about all of the steps involved that will make this happen.

Thank you all in advance for reading/answering my questions

Cheers
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Question by:Bibecu
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guswebb earned 2000 total points
ID: 39712460
The 3rd party application can send emails from whatever address you like e.g. mail@mydomain.com. You will need to make sure that it's IP address is authoritative for sending mail from your chosen domain name. You do this via setting an SPF record in DNS (see https://www.microsoft.com/mscorp/safety/content/technologies/senderid/wizard/) and also by applying reverse DNS to your IP to match the FQDN of your 3rd party's externally facing IP address e.g. mail.mydomain.com. Your ISP can set that for you. Adopting these steps will *help* deliverability of those emails but does not guarantee it. There are other ways in which you can increase the chances of your mail landing in the correct places and not being filtered on the recipient's end.

The problem you face now is that your Exchange server will be currently set to receive all inbound traffic for your domain. So, any bounce backs will be delivered to your Exchange server and not the 3rd-party application. You could change this by altering the MX records for your domain to include the IP address of the 3rd party application and giving it a higher priority than your current MX record that points to your Exchange server, however when you do that, *all* mail for your domain will then route to the 3rd party application's IP address and not to your Exchange server.

I would suggest you don't follow this last step but instead allow the bounce backs to be delivered to your Exchange server. You can forward them on from there using a mailbox rule to the other server for processing, if that's what you need to do.

What processing are you wanting to do on the bounce backs exactly?
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Author Closing Comment

by:Bibecu
ID: 39744556
Sorry for the delay, I was away on vacation .   Thanks for your answer, very good
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