Mail Gateway for Exchange

Hello Experts

I have a customer who has a working Mail system Exchange 2010 he is asking me to provide him with a Gateway for Exchange . I wonder what the Guy wants . Is it possible to provide a gateway  for an exchange Server without Modifying the DNS records (A and MX)

Because from my understanding he wants all the mail to pass trough my Infrastructure . for me it means that the MX records will be pointing to my server who will relay the mail to his Server. I usually use Maildaemon Mail Server Upfront

is there another way to do this ?
gazambeyIT CONSULTANTAsked:
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Will SzymkowskiSenior Solution ArchitectCommented:
Based on what I have read you will want to put the smart host (email gateway) in front of your Exchange Infrastructure. You will then point the MX records to this Email Gateway which will then pass the email into your environment where it will then be routed to your customers Mail server.

When you do this from your Exchange environment you will need to create a "Receive Connector" to allow mail to be passed from the Email Gateway to your Exchange Server.

Depending how the customer Sends email you will also need to create a Send Connector which points to the Email Gateway (smart host) which you have put in place.

You will also need to make sure that whatever IP you provide to the Email Gateway (external IP) that you have your reverse IP pointing to (MX). If you don't you will get flagged as a spammer.

gazambeyIT CONSULTANTAuthor Commented:
Thx Will

So this bring us to the point that i have to have a hand in the domain of my client . rigth? I mean to do things like pointing the MX for a particular domain

Will SzymkowskiSenior Solution ArchitectCommented:
That is correct.

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