Kyocera Scan to Email Error 4803
Kyocera error 4803 is a reviewed Scan to Email/SMTP condition: the device could not create the SSL connection to the mail server. Use this meaning only when the failed operation is the Kyocera Scan to Email workflow.
Error meaning
The device could not create the SSL connection to the mail server.
This meaning is tied to the reviewed family/platform and subsystem below; do not reuse the number by itself on a different printer family or protocol.
Applies to
Kyocera Scan to Email error-code platform
- ECOSYS MA/M552x multifunction families documented by Kyocera
- TASKalfa multifunction devices using the reviewed Scan to Email error table
Common formatting
These are formatting/lookup aliases for this reviewed condition, not separate error pages.
- 4803
- Kyocera 4803
- send error 4803
- scan to email 4803
What usually causes it
- The printer does not trust the server certificate.
- The server certificate is invalid/expired or the device clock is wrong.
- The SSL/TLS mode or port may not match the mail server.
What to try
Check the printer date and time
Certificate validation can fail when the device clock is wrong.
Review trusted certificates
Confirm the required root/intermediate certificates are installed as supported by the device.
Compare SSL/TLS mode and port
Make sure the printer's secure-mail setting matches the server configuration.
Retry without bypassing trust checks
Send the same small scan after correcting certificate/TLS settings.
After each corrective action
Retry the same operation that produced 4803. If it now works, stop there rather than changing unrelated printer, network, or service settings.
If the code returns
If 4803 returns, the mail or device administrator should inspect the certificate chain and TLS configuration. Do not disable certificate validation as a workaround.
When service may be needed
These settings affect network or mail security. If the required server, authentication, or certificate values are managed by your organization, have the administrator make the change rather than guessing.
Continue with guided troubleshooting
If the printer still is not working after the reviewed checks, carry this verified error context into the guided troubleshooter.
Related information
Verified source
Official Kyocera Document Solutions Scan to Email error-code overview, updated 2026-06-04; code meaning is scoped to the Scan to Email/SMTP context.