Toshiba E-STUDIO 2020AC Frequently Asked Questions Manual page 72

10.QUESTIONS FOR ERROR CODES
Error code
3D30 Fax unit is not installed
3E10 POP3 server communication error
3E20 POP3 server communication timeout
3E30 POP3 login error
3E40 POP3 login type error
72 Questions for Error Codes
Description Corrective action
Make sure that the Fax unit is installed, or connected
correctly.
Check whether the POP3 server address is correctly set and
the POP3 server works properly. In addition, if SSL/TLS is
enabled, make sure that the SSL/TLS setting and port
number are correctly set.
Check whether the POP3 server works properly and the
LAN cable is connected to the server correctly.
Check that the POP3 user name and password are set
correctly.
Check that the POP3 login type (Auto, POP3, APOP) is set
correctly.