you can also turn on, for example, extra pop3 logging. then with a little help from
rfc 1939, you can see if the client and server are issuing appropriate commands, and if the server is choking.
on the server:
In the file /opt/zimbra/conf/log4j.properties, find this line:
log4j.logger.zimbra=ERROR,SYSLOG
and add this line right below it:
log4j.logger.zimbra.pop=DEBUG
save that, and run
tomcat stop; tomcat start
this will log pop3 transactions in /opt/zimbra/log/zimbra.log
on the client:
for outlook express:
check the box next to Mail in
Tools menu/Options.../Maintenance tab/Troubleshooting
the log will be here:
C:\Documents and Settings\<user name>Local Settings\Application Data\Identities\{<LONG-STRING-OF-DIGITS>}\Microsoft\Outlook Express\pop3.log
for outlook:
ms help