What sends to exim?

Question

Exim

In the postmaster I see a send and send something to the reject.
exim -bpc
0 no messages
in spol/exim4/input set duplication of all traffic to your mail through the Exim filter - no messages What can and where to send, how to catch?

Answer 1

Add the queue_only exim to the config and restart it. Exim will accept messages in the queue, but will not deliver messages from the queue, so you can examine the messages in the queue. After you have found the desired letter, do not forget to remove queue_only and restart Exim again.