One additional thing that I noticed is one event of INFO type, which was recorded before or after those ERRORS (53) occured. Like the other cases, all messages, reported as "cannot delete" were actually deleted from /Drafts folder.
The event, which was recorded, was:
This means, that ME is trying to delete file, which does not exist and thus probably exceeds execution time limit.The VB Application identified by the event source logged this Application MEWebMail: Thread ID: 2404 ,Logged: MailEnable - Download error (-2147467259):006~ASP 0251~Response Buffer Limit Exceeded~Execution of the ASP page caused the Response Buffer to exceed its configured limit.:C:\Program Files\Mail Enable\postoffices\domain.com\MAILROOT\user\Inbox\3C328608F08F4CBE844EEB33A0D35ED8.MAI
Now, I did some tests:
ERROR(53) could not delete files
is only produced when you click DELETE ALL button in WebMail under ANY folder! If you delete messages one-by-one, or if you move them to Deleted folder, this error does not occur.
To help identify problem, I logged events with FileMon.
There are some NOT FOUND errors, but they occur regulary, so I disregarded them.
One additional error, which was recorded ONLY when ERROR(53) event was recorded, was this cannot open token:
Also, the same ERROR(53) error event is recorded when I compose new message and send it. Just by pressing SEND buton, ERROR(53) event is recorded, saying:2453 20:49:15 dllhost.exe:2568 DIRECTORY C:\Program Files\Mail Enable\postoffices\domain.com\MAILROOT\username\Drafts\ NO SUCH FILE FileBothDirectoryInformation: _*.MAI
2454 20:49:15 dllhost.exe:2568 DIRECTORY C:\Program Files\Mail Enable\postoffices\domain.com\MAILROOT\username\Drafts\ NO SUCH FILE FileBothDirectoryInformation: _*.MAID
Why in folder /Drafts if I was NOT in /Drafts folder - I was in /Inbox folder, creating and sendng NEW message?!The VB Application identified by the event source logged this Application MEWebMail: Thread ID: 2404 ,Logged: MailEnable Webmail could not delete file (error 53):C:\Program Files\Mail Enable\postoffices\domain.com\MAILROOT\username\Drafts\B8704746507642D6B1C947205FEC1C76.MAI