Re: [exim] Using Exim as Backup Mail server

> > I am interested in learning how to use an Exim server as a backup for
> > multiple separate domains. My goal would be for the Exim server to
[...]
> Going from the default configuration file, you just have to define all
> the domains you want to relay mail for in a domainlist like this:
>
> domainlist relay_to_domains = domain1.tld : domain2.tld
>
>
> Then configure a smarthost so that any mail received by your exim server
> will be sent to your main server:
> So as your fist router in the routers section:
>
> smarthost:
> driver = manualroute
> domains = +relay_to_domains
> transport = remote_smtp
> route_list = * my.primary.server.tld
> host_find_failed = defer
> same_domain_copy_routing = yes
> no_more

I would suggest to add some sort of rcpt validation at SMTP time in order
to limit potential spam/worm backscatter.


Fabio