[bash]
<= message arrival
=> normal message delivery
-> additional address in same delivery
*> delivery suppressed by -N
** delivery failed; address bounced
== delivery deferred; temporary problem
<> bounced message
A authenticator name (and optional id)
C SMTP confirmation on delivery
command list for “no mail in SMTP session”
CV certificate verification status
D duration of “no mail in SMTP session”
DN distinguished name from peer certificate
DT on => lines: time taken for a delivery
F sender address (on delivery lines)
H host name and IP address
I local interface used
id message id for incoming message
P on <= lines: protocol used
on => and ** lines: return path
QT on => lines: time spent on queue so far
on “Completed” lines: time spent on queue
R on <= lines: reference for local bounce
on => ** and == lines: router name
S size of message
ST shadow transport name
T on <= lines: message subject (topic)
on => ** and == lines: transport name
U local user or RFC 1413 identity
X TLS cipher suite
[/bash]

Clear the exim mail queue
[bash]
/usr/sbin/exim -Mrm `ls /var/spool/exim/input/ | grep — -H$ | cut -c 1-16`
[/bash]