Log Retention Setting
For an on premise installation of CanIt Domain-Pro you are able to increase the log retention time by editing the /etc/mail/canit/canit.cont file. Note that this will increase the amount of space required for logs.
The following demonstrate an example of the setting that should be added.
Then after editing the file you will need to run:
service canit-system restart
If you have a cluster this needs to be done on all nodes.