839(p. 725) #841(p. 725), 844(p. 725) #846(p. 725) #852(p. 725) – Canon imageCLASS MF753Cdw Multifunction Wireless Color Laser Printer User Manual

Page 735

The machine prints or saves to memory pages 1 to 999 and deletes page 1,000 and beyond. Have the

sender resend page 1,000 and beyond.

When Receiving an I-Fax
The machine cannot receive an e-mail that exceeds 24 MB. Have the sender reduce the size of the e-mail to

24 MB or less and resend it.

#839

The user name or password to be used for SMTP authentication is not set correctly.

Set the User Name and Password Correctly.

#841

Communication with the SMTP server is set to be encrypted, but there is no encryption algorithm shared with the

SMTP server, so encrypted communication failed. Alternatively, a verify certificate error occurred.

Check the Algorithms Supported by the SMTP Server and Those Supported by the Machine.

●

For details about the algorithms supported by the SMTP server, contact your provider.

●

For details about the algorithms supported by the machine, see the following:

Is an Appropriate CA Certificate Registered?

Check that the CA certificate used for authentication of the SMTP server is registered to the machine.

Check the SMTP Server Certificate.

Check that the server certificate is correct and is not a self-signed certificate.

Disable Encryption When Communicating with the SMTP Server

#844

Communication with the POP3 server is set to be encrypted using POP authentication before sending data (POP

before SMTP), but encrypted communication failed. Alternatively, a verify certificate error occurred.

Is an Appropriate CA Certificate Registered?

Check that the CA certificate used for authentication of the POP3 server is registered to the machine.

Check the POP3 Server Certificate.

Check that the server certificate is correct and is not a self-signed certificate.

Disable Encryption When Communicating with the POP3 Server

#846

APOP authentication is set to be used to encrypt the password at authentication using POP authentication before

sending data (POP before SMTP), but APOP authentication failed.

Disable APOP Authentication.

#852

The power of the machine turned OFF for some reason.

Troubleshooting

725