Lexmark 6500e Installation And Configuration Manual page 27

3
Click Apply.
"Email cannot be sent. Unable to find valid encryption certificate
for [E-mail address]" error message
This error indicates the LDAP Directory found in the Address Book Setup did not contain an encryption certificate for
the specified E-mail address. Encrypted E-mail can only be sent to recipients found in the global address book, and
each recipient must have an encryption certificate. Verify that the intended recipient is in your global address book.
Unable to send E-mail (SMTP-related issues)
When users are unable to send E-mail, there can be several possible causes:
"I M
NVALID ESSAGE
This problem occurs in earlier versions of the firmware, so verify that you have the correct firmware version installed.
For information about finding the correct version for your printer, see "Verifying and updating the firmware" on
page 6. If you have verified or updated your firmware and still experience this problem, contact the Lexmark
Solutions Help Desk.
"501 5.5.4 I
NVALID
The domain name on the device has not been configured correctly:
1
From the Embedded Web Server, click Settings > Network/Ports > TCP/IP.
2
Under TCP/IP, verify or correct the Domain Name entry.
3
Click Submit to save any needed changes.
Note: For more information about TCP/IP settings, see "TCP/IP settings" on page 8.
T SMTP
HE SERVER ALLOWS ONLY AUTHENTICATED USERS TO SEND
1
From the Embedded Web Server, click Settings > E-mail/FTP Settings > SMTP Setup.
2
For SMTP Server Authentication, select Kerberos 5. If Kerberos is not supported, select No Authentication
Required.
Note: If the SMTP server requires user authentication to send E-mail but does not support Kerberos, the IP address
or hostname of the printer must be added to the SMTP server as a relay.
3
Click Submit to save any needed changes.
SMTP S A
ERVER UTHENTICATION IS SET TO
IP
TO AN ADDRESS FOR THE
If the SMTP server uses Kerberos for authentication, then you must point to the server by hostname, not IP address.
1
From the Embedded Web Server, click Settings > E-mail/FTP Settings > SMTP Setup.
2
Under SMTP Setup, type the hostname of the Primary SMTP Gateway the device will use for sending E-mail.
ID"
ERROR FROM THE
A "
DDRESS ERROR FROM THE
SMTP
SERVER
Troubleshooting
SMTP
SERVER
SMTP
SERVER
K 5,
ERBEROS BUT THE PRINTER SETTINGS POINT
27
E-
MAIL