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exchnage 2003

ineed some help on adding second domain to our exchange serverexchnage org:
one front end server in the DMZ
one mailbox store server in the lan
existing domain is first.com
would like to add second.com
i  i will need to create a new mx record for second.com pointing to the smae external ip as first.com mx record
what do i need to do on the exchange server, do i need to do anything on the front end exchange server
1 Solution
Rajith EnchiparambilOffice 365 & Exchange ArchitectCommented:
1. Front end server should not be in the DMZ.

2. You need to add the new domain in the email address policies in ESM.
Check your DNS

Add  a second domain in the recipient Policy email address policy section of exchange system manager

test internally to send to a user with the second internal email address domain.
Ensure that the user as a an email address for the second email domain. Note the policy can automatically add email addresses for the new domain to all our users of you want.

test external in
In the new external DNS zone (second.com) create a MX RECORD and point it at your existing mail server name e.g. "mail.first.com." (include the final full stop to tell DNS it is a fully qualified DNS name)
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dano992Author Commented:
if my existing mx record is mail.first.com
i need to create a new mx record for the new domain
should it be "mail.second.com" pointing to the same ip as my original mx record
or should it be "mail.first.com" that allready exists for my original domain?
Make it "mail.first.com." because this is the name your server sends out as and matches your SMTP banner and reverse DNS so other servers will like yours more instead of seeing your sent mail from @second.com as spam if the SMTP banner RDNS etc does not match the sending server name.
dano992Author Commented:
i looked at my recipient policy to add the new domain and my exiting policy
looks like this:
SMTP   %g .%s@mydomain.com
smtp    %g%1s@mydomain.com

ive never sennn this before can anyone share some light
usually i would expect @mydomain.com
They are variables.
%g = given name
%s = surname
%1s = 1st letter if surname
If = of
In my above comment

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