[EXIM] Another way of doing this ? (Internal-External polici…

Hi,

I'm fairly new to exim and was wondering if there could a be
another (better!) way of doing this.

Here's what I'm trying to achieve,

all users can receive mail from "internal domains"
some users can receive and send mail to "external domains"

I've take some tips from the FAQ about permitting only
certain users to send to external mail and came up with my own
for the receiving part.

Of course there are more external domains then internal ones ...


Thanks

#
# Directors
#
localuser:
driver = localuser
transport = local_delivery
condition =
"\${lookup{$sender_address_domain}lsearch{/exim/perm/domains}{yes}}"

localuser_from_external:
driver = localuser
transport = local_delivery
condition =
"\${lookup{$local_part}lsearch{/exim/permitted/receivers}{yes}}"

localuser_from_external_bounce:
driver = smartuser
transport = reject_remote_user
no_verify
unseen

#
# Routers
#
internal_delivery:
  driver = domainlist
  route_list = "*our_domain.com  $domain  bydns_mx;\
                *our_friend.com  $domain  bydns_mx;\
  transport = remote_smtp

external_delivery:
        driver = domainlist
        route_list = "*  internet-gateway.com  bydns_a"
        transport = remote_smtp
        require_files = /etc/exim/permitted/senders
        senders = "^[^@]+@(?!${rxquote:our_domain.com}\\$):\
                       lsearch;/etc/exim/permitted/senders"

#
# Transports
#
reject_remote_user:
           driver        = autoreply
           file          = /etc/exim/err_messages/reject_remote_user.txt
           file_expand
           user          = exim
           group         = exim
           from          = postmaster@${domain}
           to            = $sender_address
           subject       = "Re: Your mail to ${local_part}@${domain}"

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