What is SPAMBOX?
The received e-mail messages are filtered by a spam filter which is running on central mail server. The messages that are marked as spam are directed to a folder located under your mail directory, and it is named as SPAMBOX. You can access the SPAMBOX through Horde, SquirrelMail or pine programs; or e-mail clients using IMAP services.
Sometimes a normal e-mail can be marked as spam by the filter. Therefore you should check your SPAMBOX periodically.
The messages on the SPAMBOXes that extend the limits will be moved to another folder automatically in the same directory under the name of SPAMBOX.date and a notification e-mail will be sent. These moved SPAMBOXes will be deleted within a specified period automatically.