[exim] basic doubts in exim configuration

Hi all,
I am in the process of setting up a mail server using exim+imap cyrus.I have
studied the eim docs and configured exim's routers and transports.I have
some basic requirements in my mail server i.e any mail from:@tce.edu must be
handled by exim both from my local domain and external domain.
Will this work
domainlist relay_from_domains=@:tce.edu
acl_mail_from
accept
hosts=+relay_from_hosts
sender_domains=:+relay_from _domains

Will this accept all mails to @tce.edu from localdomain and external
interface?

Exim should handle all mails from the local interface.How to achieve it
using ACL.'s.

Thanks in advance

cheers ashok