Log files are being written at levels higher than Warnings (Information and Debug levels are the most common cause).
delete helpcommand to get details about the command options, if necessary.
delete alllogswill remove all log files generated to that point
delete allquarantinewill remove all quarantined email logs
delete coreswill remove files caused by the cores parameter
delete databasewill remove files generated by the backup command
It is recommended that you keep local logging in the SMG to Warnings for all features. If more detailed or long term logging is needed, please consider using a syslog option.