Usage of SpamAssassin
First thing you need to do is to log into your cPanel. From there, under the"E-mail" box, look at the bottom for a link that reads "SpamAssassin". From here, you can check the status of SpamAssassin if it is currently enabled or disabled. By clicking the boxes to enable or disable SpamAssassin, you can turn it on or off.
To configure the SpamAssassin settings, click the button that reads: "Configure SpamAssassin (required to rewrite subjects)"
If you do not know what it is you are looking at, the next screen could be a little confusing. To help you understand, here is the breakdown of what you should see on the screen and what to do with it:
required_hits - The number of e-mails received before marked as spam.
rewrite_subject – This tells SpamAssassin if it should rewrite your subject line or not as you define. (1 is yes and 0 is no)
subject_tag - The spam is marked with ** ______** in the subject line. (usually ***SPAM*** or something else that could be picked up by your own mail filters on the mail client of your choice)
blacklist_from - An e-mail address you definitely want to be marked as spam. (you could also use *@something.com to get every email from that address filtered)
whitelist_from - An e-mail address you definitely do NOT want to be marked as spam. (you could also use *@something.com to get every email from that address NOT filtered).
Once you're done, just hit save button and whatever you defined on the earlier page will now be in effect. If you picked to rewrite the subject, then you could now go into your mail client and write a new "rule" that would filter all mail with "***SPAM***” to go into a SPAM folder so that you could check it from time to time making sure you did not get any false positives.