Entourage stuck and updating message list
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The resultant PST files can easily be viewed and extracted in Microsoft Outlook for getting the insight matter of Entourage mails in Outlook.
In Export options, Select PST format to export Entourage Mail to Outlook PST file.
Click on Change to change the default location of destination.
There are a few things you can do to fix this issue.
Turn Off Send in Background By default, Postbox is set to send in the background, but if you have problems with messages getting stuck in the Outbox, this setting should be turned off. Compact the Outbox Folder Navigate to File menu and select "Compact." Wait 3 minutes, then restart Postbox.
We largely faced troubles regarding unresponsiveness and data loss from email client.