qtime is the time spent by a message in the queue.

ddelay is the latency for a successful delivery to one recipient---the
end of successful delivery, minus the time when the message was queued.

xdelay is the latency for a delivery attempt---the time when the attempt
finished, minus the time when it started. The average concurrency is the
total xdelay for all deliveries divided by the time span; this is a good
measure of how busy the mailer is.

Completed messages: 322
Recipients for completed messages: 313
Total delivery attempts for completed messages: 313
Average delivery attempts per completed message: 0.97205
Bytes in completed messages: 764414
Bytes weighted by success: 735101
Average message qtime (s): 0.356866

Total delivery attempts: 5436
success: 4391
failure: 11
deferral: 1034
Total ddelay (s): 268635.007304
Average ddelay per success (s): 61.178549
Total xdelay (s): 54423.834349
Average xdelay per delivery attempt (s): 10.011743
Time span (days): 0.326475
Average concurrency: 1.92942

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reasons for failure

One line per reason for delivery failure. Information on each line:
* del is the number of deliveries that ended for this reason.
* xdelay is the total xdelay on those deliveries.

del xdelay reason
8 1.21 Sorry, I couldn't find any host named lanadminsystems.com. (#5.1.2)/
1 0.01 Sorry, no mailbox here by that name. (#5.1.1)/
2 0.04 Sorry, only subscribers may post. If you are a subscriber, please forward this message to postmaster@xxxxxxx.org to get your new address included (#5.7.2)/

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Reasons for deferral

One line per reason for deferral. Information on each line:
* del is the number of deliveries that ended for this reason.
* xdelay is the total xdelay on those deliveries.

del xdelay reason
14 26.87 200.69.244.37 failed after I sent the message./Remote host said: 451 qq temporary problem (#4.3.0)/
2 1.00 66.201.122.9 failed on DATA command./Remote host said: 452 athene: Server too busy/
2 2454.33 Connected to 193.17.41.29 but connection died. (#4.4.2)/
1 1.33 Connected to 202.134.0.73 but greeting failed./Remote host said: 421 in-mta3.plasa.com: Too many concurrent SMTP connections from this IP address; please try again later./
2 6.70 Connected to 202.134.1.10 but greeting failed./Remote host said: 421 in-mta3.plasa.com: Too many concurrent SMTP connections; please try again later./
1 1.40 Connected to 203.130.196.5 but greeting failed./Remote host said: 421 in-mta3.plasa.com: Too many concurrent SMTP connections from this IP address; please try again later./
1 1.39 Connected to 203.130.196.5 but greeting failed./Remote host said: 421 in-mta3.plasa.com: Too many concurrent SMTP connections; please try again later./
1 1209.36 Connected to 203.199.70.16 but connection died. (#4.4.2)/
5 50.86 Connected to 203.199.70.33 but greeting failed./Remote host said: 421 mta103.mail.in.yahoo.com Resources temporarily unavailable. Please try again later./
1 150.24 Connected to 207.115.63.85 but sender was rejected./Remote host said: 451 4.1.8 Domain of sender address qmr-return-3482-mcrsnap=bobsmith@xxxxxxx.org does not resolve/
1 30.15 Connected to 207.44.212.170 but greeting failed./Remote host said: relaylock: db connect: failed to connect to database: Error: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)/
4 0.45 Connected to 209.202.220.194 but greeting failed./Remote host said: 421 [SMTPD]: Requested action aborted; Resource temporarily unavailable/
1 1201.70 Connected to 62.81.185.41 but connection died. (#4.4.2)/
4 4806.26 Connected to 64.156.215.5 but connection died. (#4.4.2)/
3 3603.07 Connected to 80.190.108.65 but connection died. (#4.4.2)/
13 1099.15 Sorry, I couldn't find any host by that name. (#4.1.2)/
978 5550.09 Sorry, I wasn't able to establish an SMTP connection. (#4.4.1)/