[exim] smarthost relaying

Hi Users,
if have running an Eximserver, which works all fine. The only thing is:
I can sent just through a smarthost. That means, that all my virtual
domain users sending emails with one and the same smarthost and also one
and the same senderaddress. I would like to have them own senderaddress
localpart@???. But the smarthost of course doesnt accept
these senders due to spammprevention.

Do i need an own relay? Is there a good recource for setting up an
relay? I guess i must fight with a big spamproblem then.

thanks,

--
Michael Rouba

CSP-Berlin
Consulting - Systembetreuung - Printmedien

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