Unsolicited mail is not being identified by zoho

Unsolicited mail is not being identified by zoho

Hi,

We have installed zoho ver 3 and applied the latest patches etc.. We have configured the mail to be marked as spam, but whenever we log in we still find all the spam messages sitting in the Unread folder, so we mark each message as spam, expecting the system to learn, but so far zoho has not identified any messages as being spam.

Are we doing something wrong? is there a way to debug the process? I made sure that

Settings> Admin > System Settings > Enable Antispam funcilnality is turned on
and I have the following option selected
Email>Mail options>Server Settings> Enable inbuilt AntiSpam feature to block Spam mails entering my mail box

Any ideas why the spam is not being identified?
Thanks