[exim] Bounce Handling

Hello everyone. I am hoping someone can give me a hand as I am having a
hard time of it.

I will give basic background upfront for clarification purposes.

I am setting up a server for the sole purpose of sending marketing and
informational communications to a subscription based list for a client.
This setup will not be used to accept incoming mail only sending.

My clients want to use different email addresses depending on the
department or who is sending them. i.e. books@???, tom@???.

They want to keep track of bounces/deliveries.

What I having trouble with is how do I send all bounces to a specific
address or pipe because the from email address they use to send them
will not be an actual user in the sense of configured on the server,
just a user configured via software. (I tried setting errors_to on the
router, but that did not seem to work)

Secondly, is there a way to disable the sending of "delayed" messages
also, as I don't really need to know about them unless they are a hard
fail.

Thanks in advance!

-Micah