You can use the following command to delete emails one by one from email queue.
# exim -Mrm 1SXOGY-0004C6-Gb
Message 1SXOGY-0004C6-Gb has been removed
To remove a message from the queue, enter:
# exim -bp | awk ‘/^ *[0-9]+[mhd]/{print “exim -Mrm ” $3}’ | bash
Remove mails to a particular sender in the queue :-
exiqgrep -i -t user@domain.com | xargs exim -Mrm
-t to address
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