Today, I want to mention a product or rather an installation for cPanel users is the ConfigServer MailScanner Front-End. Do not mix up with the Configserver MailScanner, even they are the same in the backend, MailScanner’s front end made your life easier and made anti-spam effectively. I recommend to cPanel users if they are looking for a cost-effective antispam solution.
Most anti-spam is not integrated. They use MX to help you filter spam emails. If it is injected to the mail server, it is local delivery though LMTP, this kind of solution is not effective. However, the integrated means you need resources, and there is on overhead especially to those have a high volume of email traffic.
If anti-spam is your top priority, Configserver MailScanner with the Front End is worth considering. With my past experience, you are safe to quarantine emails with a score as low as 2. In addition, the front end gives you the ability on how you want to keep the quarantined emails.
Anti-spam is not 100%, users unwanted email considered to a user as spam might not be the case for antispam. Antispam a few rules and gives a score of each rule to add them up should the email’s score is more than the threshold. There are cases, spam or unwanted emails have slipped through your anti-spam, MailScanner Front End allows you to click on the button to learn, to learn and port as spam, or blacklist sender and its domain.
Configserver charges USD 55 onetime fee for MailScanner front end, I personally think it is affordable and cPanel users should install if they want effective antispam.