[Exim] Unknown local recipients

I am using Exim 3.33. I would like all emails to addresses that are not set
up with mailboxes to create the standard 'unknown recipient' email message
and send it to the postmaster. I have followed the instructions in FAQ
Q0403 but all I get is frozen messages in the outbound queue. Is this
documented anywhere else, or can someone point me in the right direction.

Thanks,


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Gary Mason
Renaissance Technical Services