долгая очередь на доставку

Здравствуйте!

Можно спросить почему письмо было в очереди на доставку так долго? Что означает nTotal, nOpen ?

2007-08-27.log:19:29:18.637 2 SMTPI-027347([xx.xx.129.145]) [27910973] received, 481 bytes
2007-08-27_19-32.log:19:41:50.429 2 QUEUE([27910973]) from <>, 481 bytes ()
2007-08-27_19-32.log:19:41:50.429 4 QUEUE([27910973]) enqueued, nTotal=169498
2007-08-27_19-32.log:19:41:50.429 4 QUEUE([27910973]) opened, nOpen=25
2007-08-27_19-32.log:19:41:50.429 4 QUEUE([27910973]) applying server rules
2007-08-27_19-32.log:19:41:50.429 4 ENQUEUER-000005([27910973]) rule(drweb-antivirus) conditions met
2007-08-27_19-32.log:19:41:50.429 4 EXTFILTER(drweb) out(34): 197008 FILE Queue/73/27910973.msg\n
2007-08-27_19-32.log:19:41:50.623 2 QUEUE([27910973]) enqueued
2007-08-27_19-32.log:19:41:50.623 4 QUEUE([27910973]) closed, nOpen=21
2007-08-27_19-32.log:19:41:50.662 4 QUEUE([27910973]) opened, nOpen=25
2007-08-27_19-32.log:19:41:50.662 4 QUEUE([27910973]) closed, nOpen=24
2007-08-27_19-32.log:19:41:50.688 2 LOCAL-000015(axm06@sovintel.ru) [27910973] stored on [xx.xx.47.81]:25: 255 348214782 message stored
2007-08-27_19-32.log:19:41:50.688 2 DEQUEUER [27910973] LOCAL(axm06@sovintel.ru) delivered: Delivered to the user mailbox
2007-08-27_19-32.log:19:41:50.688 4 QUEUE([27910973]) dequeued, nTotal=169487
2007-08-27_19-32.log:19:41:50.698 2 QUEUE([27910973]) deleted

Заранее спасибо!

-- 
Anatoly Pugachev