Scan-to-email failures are almost always SMTP server configuration issues rather than a problem with the scanner hardware itself.
Symptoms to look for
Scans complete but the email never arrives
Error message referencing SMTP or authentication failure
Feature worked previously but stopped after an email provider change
What causes it
Incorrect SMTP server address or port, expired authentication credentials, or an email provider requiring app-specific passwords (common with Gmail/Microsoft 365) are the top causes.
How to fix it
Access the device's web-based configuration page and locate email/SMTP settings.
Enter your organization's correct SMTP server address, port, and encryption type.
If using Gmail or Microsoft 365, generate an app-specific password rather than your normal login.
Send a test scan to a known-working internal email address first.
Check spam/junk folders on the receiving end before assuming delivery failed.
Technician's tip
If your organization recently enabled multi-factor authentication on email accounts, that's the most common reason scan-to-email suddenly stops working — an app password fixes it.