Epson Job Status Code 321
On the WorkForce Pro WF-C878R/WF-C879R job-status platform, code 321 identifies a scan to folder / dns condition. The job type matters because Epson reuses nearby numeric ranges for different scan and forwarding functions.
Error meaning
DNS failed while resolving the network-folder destination.
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
Epson WorkForce Pro WF-C878R/WF-C879R job-status platform
- WorkForce Pro WF-C878R
- WorkForce Pro WF-C879R
Common formatting
These are formatting/lookup aliases for this reviewed condition, not separate error pages.
- 321
- Epson 321
- WF-C878R 321
- WF-C879R 321
What usually causes it
- The network-folder server host name cannot be resolved.
- The printer's DNS settings are incorrect or unavailable.
- The saved destination server name is wrong.
What to try
Check the folder server name
Compare the saved Location server/host name with the real destination.
Check the printer's DNS settings
Verify TCP/IP DNS configuration and the network connection report.
Try the same destination after DNS is corrected
Do not change folder credentials until the server name can be resolved.
Retry the original scan
Confirm the file reaches the intended folder.
After each corrective action
Retry the same operation that produced 321. If it now works, stop there rather than changing unrelated printer, network, or service settings.
If the code returns
A recurring 321 is a name-resolution problem for the folder destination. If DNS works elsewhere, have IT test resolution from the printer network.
When service may be needed
The checks above stay at the user/admin configuration level. If the setting is controlled by an organization, use the administrator rather than bypassing security or certificate requirements.
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 Epson WF-C878R Job Status Error Codes FAQ, corroborated against the WF-C879R User's Guide for the same code table.