Quick answers to your questions from the Arithon Support team.
To set up your tagging:
You will need to do the following:
> Click admin > Manage Email > Click on the tab at the top 'Tagging Email' > Select the user you wish this to be turned on for. > Tick the Tag email box against each of the folder you wish Arithon to tag emails from.
To tag historic emails, you will need to click 'Rescan folder' - which appears to the right of folders that have been ticked.