I've got a machine running exim4 with one main IP and 5 IP aliases on
the same interface.
The exim config is set up with virtual domains as follows:
domainlist local_domains =
@:localhost:dsearch;/etc/exim4/virtual:dsearch;/var/mail/virtual
/etc/exim4/virtual has a set of files - one per domain with the virtual
user maps set up. Mostly these are forwards offhost - or in some cases
to name@localhost
/var/mail/virtual - a set of directories per host - for local users that
are not actual system users.
Now - I was reading
http://lists.exim.org/lurker/message/20061217.130120.ab8d6800.en.html#exim-users
Specially the
remote_smtp:
driver = smtp
interface = ${lookup {$sender_address_domain} your_lookup {...}}
I'd really like to figure out this interface line - the your_lookup bit.
What I would like to set up is that for all domains that I can
send/receive - use the IP address of the relevant domain's MX.
For any that I only send as (the machine is also a webserver for some
domains for which it is not the MX - for these it sends mail for cron
jobs etc) - send as the machines main IP.
Of note is that the MX records for the virtual domains are not
necessarily under the same domain name.
Some examples:
chrissearle.org has MX of mail.chrissearle.org which is in turn a CNAME
to personal.chrissearle.org and has IP of 78.47.168.125
wegner.no has MX of family.chrissearle.org which has IP of 78.47.168.122
and lastly - hunnor.net I am not the MX for but can send as - I'd like
that to go out from the main IP - 88.198.38.80 (this is a catchall for
all the sites that are not listed under /var/mail/virtual).
I'm not so hot at exim config - if I could get some pointers on how to
structure this I'd really appreciate it :)
