------------- remove all queued messages at once in a safe way
exim -bp | awk '/^ *[0-9]+[mhd]/{print "exim -Mrm " $3}' | sh
------------- message in mail queue bounced to a certain address
   exim -Mf   14Fdlq-0003kM-00
   exim -Mmad 14Fdlq-0003kM-00
   exim -Mar  14Fdlq-0003kM-00  new@ddress
   exim -M    14Fdlq-0003kM-00

------------- spamassassin user preferences
  --virtual-config-dir=/var/exim/userprefs/%d/%l/sa

%d = domain
%l = localpart