root@hostname:/home/shimizu# aptitude install pflogsumm
以下の新規パッケージがインストールされます:
  libbit-vector-perl{a} libcarp-clan-perl{a} libdate-calc-perl{a} libdate-calc-xs-perl{a} pflogsumm 
更新: 0 個、新規インストール: 5 個、削除: 0 個、保留: 2 個。
525 k バイトのアーカイブを取得する必要があります。展開後に 1,569 k バイトのディスク領域が新たに消費されます。
先に進みますか? [Y/n/?] y
...

root@hostname:/home/shimizu# pflogsumm /var/log/mail.log 
Grand Totals
------------
messages

      4   received
      0   delivered
      0   forwarded
      0   deferred
      8   bounced
      0   rejected (0%)
      0   reject warnings
      0   held
      0   discarded (0%)

   3548   bytes received
      0   bytes delivered
      1   senders
      1   sending hosts/domains
      0   recipients
      0   recipient hosts/domains


Per-Day Traffic Summary
-----------------------
    date          received  delivered   deferred    bounced     rejected
    --------------------------------------------------------------------
    Nov 16 2014         1          0          0          2 
    Nov 17 2014         1          0          0          2 
    Nov 18 2014         1          0          0          2 
    Nov 19 2014         1          0          0          2 

Per-Hour Traffic Daily Average
------------------------------
    time          received  delivered   deferred    bounced     rejected
    --------------------------------------------------------------------
    0000-0100           0          0          0          0          0 
    0100-0200           0          0          0          0          0 
    0200-0300           0          0          0          0          0 
    0300-0400           0          0          0          0          0 
    0400-0500           0          0          0          0          0 
    0500-0600           0          0          0          0          0 
    0600-0700           1          0          0          2          0 
    0700-0800           0          0          0          0          0 
    0800-0900           0          0          0          0          0 
    0900-1000           0          0          0          0          0 
    1000-1100           0          0          0          0          0 
    1100-1200           0          0          0          0          0 
    1200-1300           0          0          0          0          0 
    1300-1400           0          0          0          0          0 
    1400-1500           0          0          0          0          0 
    1500-1600           0          0          0          0          0 
    1600-1700           0          0          0          0          0 
    1700-1800           0          0          0          0          0 
    1800-1900           0          0          0          0          0 
    1900-2000           0          0          0          0          0 
    2000-2100           0          0          0          0          0 
    2100-2200           0          0          0          0          0 
    2200-2300           0          0          0          0          0 
    2300-2400           0          0          0          0          0 

Host/Domain Summary: Message Delivery 
--------------------------------------
 sent cnt  bytes   defers   avg dly max dly host/domain
 -------- -------  -------  ------- ------- -----------
 
 Host/Domain Summary: Messages Received 
---------------------------------------
 msg cnt   bytes   host/domain
 -------- -------  -----------
      4     3548   mail.akat.info

Senders by message count
------------------------
      4   root@mail.akat.info

Recipients by message count: none

Senders by message size
-----------------------
   3548   root@mail.akat.info

Recipients by message size: none

message deferral detail: none

message bounce detail (by relay)
--------------------------------
  none (total: 8)
         8   mail for mail.akat.info loops back to myself

message reject detail: none

message reject warning detail: none

message hold detail: none

message discard detail: none

smtp delivery failures: none

Warnings: none

Fatal Errors: none

Panics: none

Master daemon messages: none

### 昨日のログを分析する ###
root@hostname:/home/shimizu# pflogsumm -d yesterday /var/log/mail.log

### smtpd connectionの統計を表示する ###
root@hostname:/home/shimizu# pflogsumm --smtpd-stats /var/log/mail.log 

### rejectしたIPやホスト情報をリストする ###
root@hostname:/home/shimizu# pflogsumm --rej-add-from /var/log/mail.log

### bounceメールの上位10件を表示する ###
root@hostname:/home/shimizu# pflogsumm --bounce-detail 10 /var/log/mail.log | lv

### 複数のファイルを取り込み可能 ###
root@hostname:/home/shimizu# pflogsumm /var/log/mail.log /var/log/mail.log.1