How can I send or reply using an alias e-mail address with a different domain name?

I have an exhcange server configured to work with my AD domain i.e.(user@myworkdomain.com)  I have another domain name xyz.com that I want to be able to send/receive e-mail from.  (user@xyz.com).  I have configured exchange to allow thsi domain and if I send e-mail to user@xyz.com, I receive the e-mail.

How can I SEND e-mail from user@xyz.com and RESPOND to e-mail sent to user@xyz.com and it show to be FROM user@xyz.com.

Right now...

1.  I can receive e-mail sent to user@xyz.com.  If I reply, it is sent FROM user@myworkdomain.com
2.  If I start a NEW e-mail and change the FROM field to user@xyz.com I get an error from Exchange...  "You are not allowed to send this message because you are trying to send on behalf of another sender without permission to do so. Please verify that you are sending on behalf of the correct sender, or ask your system administrator to help you get the required permission. "

can anyone help?
LockDownLanceAsked:
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shauncroucherCommented:
That's right, you have to create a seperate mail enabled account and allocate this the second domain (you can forward mail straight on to the original email address if you want to). Or third party software

This is a limitation of Exchange I'm afraid.

See this blog for lots more info: http://www.amset.info/exchange/twodomainsoneuser.asp

Shaun
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shauncroucherCommented:
You need to set the 'Send As' permissions in Exchange Management Console --> Recipient Config --> Mailbox --> Link on right hand side.

You need to make sure that you haven't ALSO got 'Send on behalf of' rights assigned as they will interfere with this process.

The mail will also come from the primary email domain, unless you manually select the alternative domain when replying.

Shaun
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Glen KnightCommented:
You will need to configure seperate mail enabled users which each address, you can then use the send as permission.

You cannot chose which address you send from if they are all added to the same user.
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shauncroucherCommented:
Thanks demazter, I forgot to mention that you do need seperate mailboxes here.

Shaun
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LockDownLanceAuthor Commented:
I'm lost here...

I have one AD user with 2 e-mail addresses in EMC.  The domain e-mail address (user@myworkdomain.com) and the e-mail address from the other domain.  (user@xyz.com)

I am able to RECEIVE into my user@myworkdomain.com mailbox e-mail sent TO user@xyz.com.  I simply want to reply to e-mail sent to user@xyz.com with the same e-mail address rather than my user@myworkdomain.com.

I also want to be able to send NEW e-mail from the user@xyz.com address.

The 'send as' option in EMC seems to want to send e-mail AS another AD user...  user2@myworkdmain.com rather than the original...  



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Glen KnightCommented:
If you don't want to have seperate e-mail addresses then thee is a 3rd party product that can do this for you if the addresses are all on the same user account.

see here: http://www.ivasoft.biz/smartreply2007.shtml
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LockDownLanceAuthor Commented:
Wow, that seems fairly archaic for something I would think many businesses need to do.  

Thanks!
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Glen KnightCommented:
Unfortunately that's just the way it's configured.
I support 50+ companies and not one of them has asked for this so I guess there is not much call for it.
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shauncroucherCommented:
A few businesses do want this feature, it appears on these forums from time to time.
It suprises many people that it is not more easily catered for, but you must remember that Exchange is designed *primarily* for those with a single identity, and not for hosting multiple domains.

Shaun
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Glen KnightCommented:
We do see it now and again, but as you have said (Shaun) Exchange is only designed for a single domain environment.

There are 3rd party tools available and I guess they have never seen the need to add this functionality in to the core product.
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