White label emails


New Email
Hi all

I have a client that wants to offer my services but as them - ie White labelling.

They want their clients to email (service)@theredomain.com. This will then come to me by auto rule to myname@mydomain.com. This will obviously work but then I need to reply as (service)@theredomain.com to there client.

How can I do this as I want it to go directly to the client and not through my clients system?

Many thanks in advance.

I have an exchange 2003 server