Canon imageRUNNER ADVANCE C5560i III User Manual page 1340

◼
#839
The user name or password set in <Communication Settings> is incorrect.
● Check the user name and password settings for SMTP authentication (SMTP AUTH) in <Communication
Settings>.
Setting E-mail/I-Fax Communication(P. 74)
◼
#841
An encryption algorithm shared with the mail server does not exist for e-mail and I-fax transmission.
● Set <Allow TLS (POP)> or <Allow TLS (SMTP TX)> in <Communication Settings> to <Off>.
Setting E-mail/I-Fax Communication(P. 74)
● Add a common encryption algorithm to the mail server settings.
◼
#842
The mail server requested authentication using a client certificate for e-mail and I-fax transmission.
● Set <Allow TLS (POP)> or <Allow TLS (SMTP TX)> in <Communication Settings> to <Off>.
Setting E-mail/I-Fax Communication(P. 74)
● Change mail server settings so that a client certificate is not requested.
Sending could not be performed because a validation error occurred when validating the TLS server
certificate when sending with SMTP because <Confirm TLS Certificate for SMTP TX> is set to <On>.
● Use the Remote UI to check whether the CA certificate used to sign the TLS server certificate on the SMTP
server side is registered in the machine.
● Check whether the TLS server certificate on the SMTP server side is correct.
● Check whether the TLS server certificate is a self-signed certificate.
◼
#843
There is a great difference between the time of the KDC (Key Distribution Center) server and the time set
in the machine.
● Adjust the current date and time in <Date/Time Settings>.
Setting the Date/Time(P. 19)
● Adjust the current time set in the KDC (Key Distribution Center) server.
◼
#844
Failed to perform TLS encrypted communication with the POP server when sending with POP before
SMTP.
● Check the TLS encrypted communication settings of the POP server.
● Set <Allow TLS (POP)> to <Off> in <Communication Settings>. If the problem is not resolved, set <POP
Authentication Before Sending> to <Off> in <Communication Settings>, and switch to a setting other than
POP before SMTP.
Setting E-mail/I-Fax Communication(P. 74)
Sending could not be performed because a validation error occurred when validating the TLS server
certificate when communicating with the POP server because <Confirm TLS Certificate for POP RX> is set
to <On>.
Troubleshooting
1326