Canon MAXIFY MB2750 Online Manual page 1283

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Cause
Communication with mail server failed.
What to Do
Tap OK on the touch screen of the printer.
Make sure that the incoming account and incoming password in mail server settings are correct with
Remote UI.
Setting Mail Server
If the error is not resolved, check your mail server condition.
For settings and condition of your mail server, contact the administrator of mail server.
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