Exchange 2013 - forward mail from one domain to another on same server

Hi all,
Sorry for the confusing title. We are planning on moving over to Exchange 2013 from Mdaemon. At the moment i have 2 companies running on the one mailserver with multiple domains. In Mdaemon i am able to just put in a rule that all mail from domain x is for domain y - via alias. It does not seem that this is the case in Exchange. How would i set up this rule in exchange?

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ChrisSenior Technical ArchitectCommented:
so if mail comes in for you want it to go to

Its possible to do this in a few ways if you can confirm what you need then i could recommend a way of doing this
burny1Author Commented:
Yes, basically what happened is the companies originally started off with a specific domain and then later acquired new domains. There are still people who use the old domains for sending mail so we need  to accommodate them. I am looking for the easiest way to do this. effectively * must be recognised as being mail for *

Hope this clears it up?

Will SzymkowskiSenior Solution ArchitectCommented:
If you have acquired more domains then you need to do the following...
- setup accepted domains in your Exchange envirionment for each domain
- setup email address policies for each accepted domain (you can customize this to apply to your specific users)

Once that is properly setup when someone externally send to it will go into the users mailbox where their primary smtp address is This will allow the user to receive on both and

However you can only send from your primary smtp address which would be either one of the domains you choose. You cannot send from multiple domains at once.

Accepted Domains

Email Address Policies

ChrisSenior Technical ArchitectCommented:
in addtion to the steps above where you have an old and new address on one mailbox you can do setup address rewriting to help transition to the new domain

as emails come in for the old domain you can rewrite them on the way so they are delivered to the new domain name and and any new emails send out are send as the new domain

If you want to send out as the old domain as well but only for a certain set of users you can set them to have outbound rewriting

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burny1Author Commented:
Hi Will and irweasel,
Apologies for the delayed response - had some server issues that needed attention first. Thanks for the responses, i will test them out and revert back in the next day or so.
Appreciate your help so far!
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