There may be a need to supply statistics on email processing. This might be necessary to support any time invested on email administration. Alternatively, it may be desired to chart the trends in general email use and in the proportions of ham and spam.
One basic statistic is the number of emails processed. By subtotaling both ham and spam, and then creating per-user statistics, a good representation of the dynamics of the email in a corporation can be built up.
Another useful report is the length of time taken by SpamAssassin to process email. Apart from giving an immediate statistic on the delay of email due to spam processing, this report is useful for long term planning; if email processing is taking longer each month, it indicates that the load on the system is increasing and also suggests that additional resources may be required to improve the quality of services.