The default uudemon.cleanup shell script does the following:
Collects log files for individual machines from the /var/uucp/.Log directory, merges these files, and places the files in the /var/uucp/.Old directory with other old log information
Removes work files (C.) seven days old or older, data files (D.) seven days old or older, and execute files (X.) two days old or older from the spool files
Returns mail that cannot be delivered to the sender
Mails a summary of the status information that was gathered during the current day to the UUCP administrative login (uucp)