Winmail服务器的pop3日志，
有几个用户连上之后会一直连个几千行，日志也认认真真地记录几千行；
其他的用户则很简单几行就连完了。
请问这是什么原因，怎么解决？
2016/10/01-00:05:47 510012 Connect from *.*.*.*
2016/10/01-00:05:47 510012 command = CAPA
2016/10/01-00:05:47 510012 command = USER ***********@*******.com
2016/10/01-00:05:47 510012 command = PASS
2016/10/01-00:05:47 510012 login success: ***********@*******.com
2016/10/01-00:05:49 510012 command = STAT
2016/10/01-00:05:49 510012 command = UIDL 1
2016/10/01-00:05:49 510012 command = UIDL 2
2016/10/01-00:05:49 510012 command = UIDL 3
2016/10/01-00:05:49 510012 command = UIDL 4
2016/10/01-00:05:49 510012 command = UIDL 5
2016/10/01-00:05:49 510012 command = UIDL 6
2016/10/01-00:05:49 510012 command = UIDL 7
2016/10/01-00:05:49 510012 command = UIDL 8
2016/10/01-00:05:49 510012 command = UIDL 9
2016/10/01-00:05:49 510012 command = UIDL 10
……
2016/10/01-00:07:02 510012 command = UIDL 6768
2016/10/01-00:07:02 510012 command = UIDL 6769
2016/10/01-00:07:02 510012 command = UIDL 6770
2016/10/01-00:07:02 510012 command = UIDL 6771
2016/10/01-00:07:02 510012 command = UIDL 6772
2016/10/01-00:07:02 510012 command = UIDL 6773
2016/10/01-00:07:02 510012 command = UIDL 6774
2016/10/01-00:07:02 510012 command = UIDL 6775
2016/10/01-00:07:02 510012 command = UIDL 6776
2016/10/01-00:07:02 510012 command = UIDL 6777
2016/10/01-00:07:02 510012 command = QUIT
2016/10/01-00:07:02 510012 quit
2016/10/01-00:07:02 510012 end connection