Technical data

Configuring and Managing the POP Server
18.3 Modifying POP Server Characteristics
Table 18–2 POP Logical Names
Logical Name Description
TCPIP$POP_SECURITY value Defines a level of security for the POP server. Determines
the timing and text of error messages sent from the POP
server to the POP client when authorization errors occur
(for example, when an invalid user name or password is
sent):
• FRIENDLY (default)
The error messages provide information about a
particular error. For example, if a password is incorrect,
the client receives the following error message:
-ERR password supplied for "jones" is incorrect
• SECURE
One error message is sent in response to all
authorization errors except when an invalid user name
is specified. For example:
Access to user account "jones" denied
When the POP server receives an invalid user name,
it replies to the POP client with a
+OK message. After
the POP client sends the password, the POP server
sends the
-ERR access denied message. This method
prevents an unauthorized user from knowing whether
the access was denied because of an incorrect user name
or password.
TCPIP$POP_TRACE If defined, the POP server records all messages sent to and
received from the POP client in a log file.
TCPIP$POP_LOG_LEVEL value Defines the type of messages logged by the POP server:
• ERROR
Logs only error messages.
• INFORMATIONAL (default)
Logs informational messages and error messages.
• THREAD
Logs information about client and server interactions as
well as informational and error messages.
• DEBUG
Logs full diagnostic information. This is used for
problem diagnosis.
TCPIP$POP_POSTMASTER value Defines a person or persons to receive a failure mail
message from the POP server startup procedure
(TCPIP$POP_STARTUP.COM) when the POP server
exits with an error. For example, to have the failure mail
message sent to users JONES and SMITH, define the logical
name as follows:
$ DEFINE/SYSTEM TCPIP$POP_POSTMASTER "JONES, SMITH"
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Configuring and Managing the POP Server 18–9