Imapd log is empty-Sieve troubleshooting

[Josh Christie]

I am troubleshooting Cyrus Imap 2.0.9 on RedHat 7.1 to figure out why
Sieve isn't working, but the imapd log files are empty.  Is there a
configuration option that needs to be set somewhere to a) enable
logging, b) increase the detail of the logging, or c) specify which file
to write log data to?

Also, are there any other log files that may help me track down why
Sieve isn't working?

Thanks a lot,

Josh Christie
NC State University