1. check the exim mail query by specific the sender or recipient
Sender:
exiqgrep -f sender@domain.com
Recipient:
exiqgrep -r recipient@domain.com
2. Get the message_id from above and add a new recipient to the message
exim -Mar message_id email@domain.dom
3. Exim doesn’t support delete a recipient, however, we can mark the wrong recipient as delivered
exim -Mmd message_id email@domain.dom
4. Deliver the message
exim -M message_id
Reference:
http://www.skillett.com/technology/computers/software/linux/hands-on-with-an-exim-cheatsheet/