Canon imagePROGRAF PRO-2000 Online Manual page 876

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Cause
Communication with mail server failed.
What to Do
Tap OK on the touch screen to dismiss the error.
Check that the mail server and device secure connection (SSL) settings match.
Check the secure connection (SSL) settings in RemoteUI.
Setting Mail Server
Contact the mail server administrator to configure a secure connection (SSL) to the mail server.
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