Kyocera FS-1030MPF Service Manual page 125

Code
4803 Failed to establish the SSL session.
Contents Check procedures/corrective measures
1. Verify the self certificate of the device.
2. Check the server certificate of the SMTP/POP3
server.
3. Check the SMTP/POP3 configuration of the device
and the SMTP/POP3 server.
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2MH/2MJ/2MK/2ML