Здравствуйте!
Что может означать большое множество( до тысячи )в Monitors-Threads ? :

VPOPInput     25526612     opening account     56 sec     waiting at VDirectoryFile
VPOPInput     25526803     opening account     45 sec     waiting at VDirectoryFile
VPOPInput     25524891     opening account     2 min     waiting at VDirectoryFile
VPOPInput     25526663     opening account     53 sec     waiting at VDirectoryFile
VPOPInput     25525266     opening account     2 min     waiting at VDirectoryFile
VPOPInput     25525469     opening account     118 sec     waiting at VDirectoryFile
VPOPInput     25526682     opening account     53 sec     waiting at VDirectoryFile
VPOPInput     25525757     opening account     100 sec     waiting at VDirectoryFile
VPOPInput     25525185     opening account     2 min     waiting at VDirectoryFile
VPOPInput     25525630     opening account     107 sec     waiting at VDirectoryFile
VPOPInput     25526971     opening account     39 sec     waiting at VDirectoryFile
VPOPInput     25525438     opening account     2 min     waiting at VDirectoryFile
VPOPInput     25525473     opening account     118 sec     waiting at VDirectoryFile
VPOPInput     25526581     opening account     57 sec     waiting at VDirectoryFile
VPOPInput     25525701     opening account     105 sec     waiting at VDirectoryFile
VPOPInput     25526209     opening account     74 sec     waiting at VDirectoryFile

Клиенты не могли читать почту .
Через час проблема ушла.