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1. Make sure that the POP server jobs are running in subsystem QSYSWRK. For
the standard IP, Client Access IP and IPX jobs you can determine this by using
the Work with Active Jobs (WRKACTJOB) command, specifying the QSYSWRK
subsystem on the AS/400 system:
WRKACTJOB SBS(QSYSWRK)
The POP server jobs start with the prefix “QTPO”, and are:
v QTPOP — Standard POP IP server connection
v QTPOC — Client Access POP IP server connection
v QTPOI — Client Access POP IPX/SPX server connection
v QTPOABCH — Client Access address book connection
POP server SNA jobs can be found by using the WRKJOB JOB(QTPOSNA)
command. Look for jobs listed as job name QTPOSNA with a status of ACTIVE
to verify that the POP server jobs are available for a SNA connection.
2. Make sure the QSYSWRK subsystem is up and running.
3. If the POP server is not running, you can start it using the Start TCP/IP Servers
command (STRTCPSVR *POP).
4. Verify that the POP server is listening for a client connection.
a. If you are using an IP or Client Access IP connection, use the Network
Status command (NETSTAT *CNN). Look for an entry for either port 110 or
pop3 if you are using a standard IP connection or as-pop3 if you have a
Client Access server connection.
b. If you are using an IPX connection, use the WRKIPXSTS
OPTION(*SELECT) command with option 4 to display IPX connection
status. You should see a LISTEN state connection. If you display details you
will see an associated user profile of QTCP. This indicates that the POP
server is listening on the IPX port.
c. Make sure the STMP and QMSF jobs are running in subsystem QSYSWRK.
If not, you can use the STRTCPSVR (STRTCPSVR *SMTP) and Start Mail
Server Framework (STRMSF) commands to start them.
Problem Determination Flows
Use the following flow chart to isolate the problem if other efforts have been
unsuccessful. The cause lists that follow identify potential problems.
Chapter 21. TCP/IP Problem Analysis 477