ErrorCodeDoctor
Canon · Printer (imageCLASS)

Canon Printer (imageCLASS) #841 / #844 / #846 error code

Difficulty: Medium · Cost: $0 · Duration: 10–15m

Error codes #841, #844, or #846 on your Canon imageCLASS printer mean a TLS or SSL encryption error occurred during email or I-Fax communication. Code #841 means no common encryption algorithm exists between the machine and the mail server. Code #844 means TLS communication to the POP3 server failed. Code #846 means POP authentication failed. Check TLS settings and certificates in the machine's email configuration.

Common causes

  • No common TLS encryption algorithm between the machine and the mail server (#841)
  • TLS communication to the POP3 server failed (#844)
  • POP authentication failure due to incorrect settings (#846)

How to fix it

  1. 1

    For #841: disable Use TLS for SMTP or add a compatible encryption algorithm to the mail server

  2. 2

    For #844: check the TLS settings on the POP3 server or disable Use TLS for POP

  3. 3

    For #846: verify the POP authentication settings are correct

  4. 4

    Check that TLS server certificates are valid and registered in Remote UI

  5. 5

    Try the email or I-Fax operation again

Related Canon Printer (imageCLASS) error codes

1

#001

An original document has jammed in the feeder

easy
2

#003

A fax could not be sent or received because the data size is too large

easy
3

#005

A fax could not be sent because the recipient's machine did not respond within 35 seconds

easy
4

#012

A fax could not be sent because the recipient's machine has run out of paper

easy