[exim] Copy list preferences and global regex for domain use…

Two quick questions:

Is it possible tocopy list preferences from one list to another?

Is it possible to create a regex in mailman that would accept emails
from all domain members even if they are not members of a list?
For example, I have complains@??? list with three members.
I would like users from host.com and lists.host.com (only) to be able
to send this list.