[Pkg-exim4-users] Configuring a fallback mailserver

Joseph tech at ekn.com
Tue Jan 3 21:16:42 UTC 2006

Dautzenberg, John wrote:
> Hello,
> We're currently running a Mail-Firewall which acts as the SMTP-server
> for our company and handling mail for several domains. In addition to
> this system I want to setup a fallback-server in case the primary server
> has an outage. (At this moment this is still done by our providers
> smtp-servers). I setup a Debian Sarge linux-box which runs smoothly but
> I have no knowledge on Exim4. The fallback-server only needs to forward
> mail for defined domains in case the primary server isn't available, and
> may not be abused as a mail-relay ofcourse. Howto set this up?

First some general tips:

o Install your exim4 package(s)
  "apt-get install exim4"

  Optionally you can install the exim4-daemon-heavy for extra compiled

o You can reconfigure your setup via the debconf tool with
  "dpkg-reconfigure exim4-config"

o Than there are some very good reading documents included:
  "zless /usr/share/doc/exim4/README.Debian.gz"
  "zless /usr/share/doc/exim4/spec.txt.gz"

o You will need to setup exim to forward the email to your main mail
server. The debconf lets you make sure that it is not an open relay.
Read the questions it askes about that.

o I think exim will hold and forward mail automatically. You just need
to tell it where to forward mail to.

> Thanks in advance,

Hope it helps.
I am sure there will be some work involed.

Maybe you could let us know what worked the best :)

respectfully, Joseph ===============
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