[Exim] How to define destination for faulty addresses for re…

Greetings,

This is not strictly a question regarding Exim configuration but it is
about SMTP in general and I am using Exim to send the mails...

I am sending a mail to a large list of recipients. Some of the addresses
may have faulty usernames, although the domain is OK. My question is; is
it possible to define an address in a header so that the receiving MTA
will send the failure report to that address?

I checked the RFC 822 and the Exim spec but couldn't find anything
definitive. The best I could find was an "Errors-To" header (which
doesn't seem to work :-(

For example:

From: me@???
To: fred@???
Errors-To: error-guy@???

If "fred" doesn't exist at mail.banana.dom, I'd like the banana MTA to
send the failure response to error-guy@??? rather than to
me@???.

Is it even possible to control (or at least, advise) the remote MTA in
this way?

Rgds,
Owen Boyle

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