All Hosting Australia hosting services, include a basic SPAM Filtering service, called Mail Scanner.  This service will deal with low level spam and provide some form of filtering.

If you require more advanced filtering, the Hosting-Australia.com SPAMProtect service offers a more advanced level of filtering, with a custom control panel and more configurable filtering settings.

To access the Mail Scanner settings, please login to your cPanel and then under the Mail category, locate the Mail Scanner icon. On the first Mail Scanner page, you will see the following:

Email Black/Whitelist Settings
You can use this to allow (Whitelist) or block (Blacklist) all emails from a particular address.

Other Settings
This page will allow you to adjust the filter settings. There are two settings to adjust here and both are related to SPAM Scoring. Each email filtered via Mail Scanner is assigned a score based on a number of factors, including: Email Content, Location of Sender, Type of attachments, To/From address and many other factors.

For example, if an email is scanned that ticks all boxes as being deemed legitimate, it will be given a SPAM Score of zero or one.  

However, should the email originate from a known SPAM location, have a zip file and a large list of random TO addresses, it would be assigned a higher score, such as 20 or 30.

The two settings available on the Other Settings Page are:

Low Scoring Spam: This settings refers to the lower end of the threshold.  And you can set this as what ever score you like. Its recommended to leave this setting as DELIVER in the delivery options section mentioned below, which makes this setting more or less defunct.
High Scoring Spam: This is the most important option when configuring filtering. The default setting is 20, but if you are seeing a lot of SPAM Delivered, you may wish to lower this to 15 or even 10. This means that any email reaching 10 or 15, will be handled as per the settings below, which is generally to Delete that email from the queue.

Current Settings
This shows an over view of the settings for all the email domains you have configured under this cPanel account.

Change Individual Domain Settings
From this section you can choose a number of options, they are:

SPAM SCANNING - Choose to disable or enable the scanning process.
VIRUS SCANNING - Choose to disable or enable the scanning process.
DELIVER CLEANED EMAILS - This will deliver emails that are cleaned of virus files. Its recommended to leave this as "NO" as any virus laden emails can still potentially contain dangerous links.
LOW SCORING SPAM - Choose what will happen to emails that reach the low scoring spam threshold, as described above.
HIGH SCORING SPAM - Choose what will happen to emails that reach the high scoring spam threshold, as described above. Choose to disable or enable the scanning process.