Setting up email access lists

[Daniel Helgenberger]

Hello,

I am trying to set up access restrictions form outside mail to certain distribution groups.
My problem: I do not seem
to be able to figure out what to set the group's "sender access list" and "recipient list" to. 

Can anyone point me to the docs? 
Can I just input some regex? What might be the delimiter?

Or, for instance, how to set a mail group in a way it is accessible from senders of internal domains only?

Thanks!
-- 
Daniel Helgenberger 
m box bewegtbild GmbH 

P: +49/30/2408781-22
F: +49/30/2408781-10
ACKERSTR. 19 
D-10115 BERLIN 
www.m-box.de  www.monkeymen.tv 
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