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SMTP Connector Help

I wanted to use an online relay service for large publications that my users send out everyday. I was looking into a service called Sendgrid. They show you a way to add a SMTP Send Connector to exchange to use their server instead. What I can't figure out is how to setup options for my users to use the sendgrid connector for publications only and the default connector for all other emails. Is there a way a user can choose? Can you setup the SMTP address space address as an email group email address?
I have exchange 2007 running on a single domain and my users are using outlook 2010.

Thanks in advance.

Chris H

Please read this, if you haven't already:

http://social.technet.microsoft.com/Forums/en-US/exchangesvrdeploy/thread/9ed68ca3-e100-40e0-8f0c-46ecddc6f2cd

It says that outbound send connectors are differentiated by the sending domain.

ait-infotech

ASKER

Yep. This is for multiple domains. I want to be able to do this on a single domain. Is that possible?

I want to route certain emails through a relay server so my exchange server isn't doing all the work.

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Postmaster

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ait-infotech

ASKER

Thank you for this suggestion. I believe that would work if i was planning on using exchange. After working with the relay service and discussing this with you it's not going to be what i want. I want to take the load off the exchange server. If I do a connector the load is still processed by the exchange server. I will have to come up with a different solution. Thanks again.

ait-infotech

ASKER

Am I thinking about this correctly? I have a distrabution list that has 1100 contacts in it. When the exchange server gets an email to this list it processes 1100 emails. With that thinking the second connector could send this message, but the exchange server would still be processing 1100 emails. Is that correct?

Postmaster

Yes and No. :)

If the addresses are ALL external, then ONE message is sent to the edge server, and that breaks the message up to send one copy to each smtp DOMAIN on the list.

So, if all addresses are hotmail.com, then only ONE email is sent out (to all recipients). If half are hotmail.com and half gmail.com, then only TWO emails go out.

Also, if you use a relay service - then only one email goes out to them to process.