[Exim] Multiple Client SMTP AUTH's

Hi.

I want to use exim (because i like its configuration-files ;) )

Now i want to setup smtp auth as described in configuration 34 (i think) but
only as client.
I have read, i can use $host to use different secrets for different hosts.
(secret1 for host1, secret2 for host2...)

I want to use plaintext files with passwords (for the moment)

Has anyone a example how i can do this. (Sorry, i'm a linux newbie)

Bye.