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belim

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mail routing in Exchange

Our company just acquired company A, and the email address is @a.com runing on MS Exchange. Our company's email address is @x.com, and is running on Domino Lotus Notes.

The management wants company A to use our email address(eg. john@x.com) but still keep their SMTP server for communiting with existing cuetomer, so we set mail forwarding in Lotus Notes. For example, mail sent to john@x.com, will be forwarded to john@a.com. We also asked users in company to set their "reply to" email address to @x.com, so it's totally transparent to the recipient.

The problem is when the employee of company A reply the email received from their peers (Company A), then it will reply to @x.com. The mail goes to company A's SMTP, then route to company X's SMTP. Finally, company X will forward the mail back to Company A, because of mail forwarding. By doing so,this is putting extra load to both SMTP servers. Both companies in different network, any better idea to make MS Exchange recognized that the email from local domain eventhough the "reply to" email address in @x.com?
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Vahik

go to recipient policy(exchange server) and add a second policy for @x.com and assign it to all users(make sure to uncheck "this exchange organization is responsible for all email delivery for this address ")(make sure this policy is not the default policy)
the rest of ur set up should not change....
u may have to enable "forward all mail with unresolved recipient to the host" and put the name of ur DOMINO server....u test for problems before enabling this option
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ASKER

Can you guide me step-step, as the system admin in the @a.com company has limited knowledge on MS exchange server, and i am lotus notes administrator without any knowledge in Exchange.
If we configure this, what if the mail send to genuine employee in @x.com? will this setting treat it local mail without rounting through SMTP??
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Vahik

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