"you can't send a message on behalf of this user" when sending from an alternate email address

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Jeroen Landheer

I have Exchange 2010, one mailbox, multiple domains that are from the same user. Let's say " John" has the following addresses associated with his mailbox (and user account in AD)
John@domainX.com John@domainY.com etc

Both domainX and domainY are accepted domains and John can receive messages from both domains. When John has " domainX.com" as his reply address, he can't send messages from " domainY.com" using Outlook, or vice versa. John (and several of his colegues) should be able to send from both domains.

How to solve this?

Ed Crowley [MVP]

That's the way it's always been. One way is to create a distribution group with his mailbox user as the only member that has the alternate e-mail address and to grant his account Send As right.Ed Crowley MVP " There are seldom good technological solutions to behavioral problems."



As Ed said this is how it always has been.

Another way to workarround this is to create a Pop account in outlook with the other address and only use this to send as the other email address.

Regards Ronny
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