[exim] relay

Hi all,

i'm running exim4 on sarge and having a problem that my clients are not
allowed to send mail via exim (relay). i got "relay not permitted" trying to
send

/etc/exim4/conf.d/acl/30 ===================
accept hosts = +relay_from_hosts accept
authenticated = *
deny message = relay not permitted

the mail server, has changed from one LAN to another one...

why am i getting this error?