Why would I use client-side filtering rather then server-side filtering?
Given that the steps provided by ITS for client-side and server-side filtering both result in Spam emails being filtered off to a single ‘Spam’ folder, there is no advantage to using client-side filtering in this case. Client-side filtering is useful if you wish to filter emails to a folder that isn’t one of the four options provided by server-side filtering. Some email clients also offer ‘bayesian’ filtering which offers more advanced ‘personalised’ spam filtering which can operate along-side server-side filtering. An additional advantage of client-side filtering is that you can configure multiple levels of Spam filtering so that Spam with a high spam score go to the Spam-7 folder (which is cleaned up after 7 days) and Spam with a lower spam score go to the Spam-30 folder (which is cleaned up after 30 days). Therefore client-side filtering offers increased flexibility.
