Sorting spam with your email client
This is the preferred method of sorting and deleting spam messages. With SpamBox disabled, you can configure SpamAssassin to mark your email with an identifying subject (such as +++SPAM+++), which can then be used to filter each message into an appropriate location.
To do this, you must directly edit the SpamAssassin configuration file on the server, if your web host allows this. Its location is: /home/example/.spamassassin/user_prefs (where “example” stands for your cPanel username). Within this file, you must add a line formatted like this:
rewrite_header Subject +++SPAM(SCORE)+++