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Make sure IMAP Administrator Access is enabled. |
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Make sure your IMAP client supports nested folders and allows you to change the port used to establish a connection with a mail server. You need to change the port that your IMAP client uses to 626. |
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Make sure you have administrative access and that mail is enabled for your account. |
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Make sure you haven't used TCP Filter Admin to block access to the IMAP Admin port from the client computer you're using. |
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Make sure the mail server's hard disk isn't full. |