Imap server - using postfix and dovecot.
Preview Pane is OFF
View is set to IMAP Hide marked for Deletion
There are no rules to delete any messages whatsoever - there is in fact, only 1 rule, which looks for messages with a specific string in the To: line - those messages are moved to another folder.
When a message comes in with an attachment, it shows up in the list of messages in the Inbox. All is well until the user double clicks on the message to read it.
The window opens and the user can read the message (and open the attachment). But as soon as the window opens, I notice (in the background) window) that the message is marked for deletion.
*This is a very bad thing*
Other things I notice:
* it only does this the FIRST TIME the user opens the message. That is, if they undelete the message, then re-open it, it is not auto-deleted.
* There are 500+ users on the email server (about 50% using IMAP, the others using Pop3), but only 3 use Outlook (the majority use Outlook Express, Thunderbird, or Squirrel mail). No other user has this happen - which means that there is no way this can be a server issue...
I have tried everything I can do (short of uninstalling Office and reinstalling). This includes wiping out the files in the C:\Doc&Sett\userid\AppData\Microsoft\Office directory (and backing up the .pst file from the \Local Settings\... directory) and letting Office recreate them (and then resetting the user's preferences).
Anyone have ANY advice on how to get this behavior to stop?