exim4 -bpc <= View the list of messages in the queue exim4 -Mvb <= View for a detailed message its body exim4 -Mvh <= View for a detailed message its headers exim4 -d+expand -be <= DEBUG PROCESS AND MAILBOX exim4 -bd -d -oX 25 <= DEBUG FOREGROUND WITH FIXED LISTENING PORT exim4 -bd -d -q15m <= DEBUG FOREGROUND exim4 -bp | awk '{print $3}' | xargs exim4 -v -M <= UnFreeze messages exim4 -bp | awk '{print $3}' | xargs exim4 -v -Mrm <= Delete queued messages exim4 -bS < smtp_stream