====== exim commandline ======

===== cheats =====
<code bash>
   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
</code>