> You need to decide what your trust model is. It looks like you're
> trying to trust some given IPs as being permitted to relay - but
> we don't know either what that "MAIN_RELAY_NETS" is defined as nor
> how you're using that hostlist.
I just found
http://mikepk.com/2010/03/note-exim-relay-split-configuration-under-ubuntu/ mentioning MAIN_RELAY_NETS.
Now I have figured out to set relay_to_domains = * to send the email to other domains.
Please let me know the risks of setting relay_to_domains to *
Thanks for the response.
... Necktwi