WHM/cPanel servers usually come with Apache SpamAssassin installed and enabled by default.
The SpamAssassin program scans each email before delivering it to the user's inbox.
If you're noticing a high amount of spam, you may want to make your rules more strict.
Alternatively, if SpamAssassin is blocking legitimate emails, you may want to loosen the filtering rules.
To do this, SpamAssassin applies a score to each email that it scans. The higher the score, the more likely the email is spam.
To make your SpamAssassin more strict, you should LOWER the score.
To make your SpamAssassin less strict, you should INCREASE the score.
The default score is 5.
You can follow the below steps to adjust the score threshold.
1. Log into cPanel of the account.
2. Go to the Apache SpamAssassin section, under the email heading.
3. At the bottom of the page, click Configure Apache SpamAssassin.
4. Set the required score. Note: Lower is more strict and will block more emails. Higher will allow more spam through. You should only raise the score if legitimate emails are being blocked.
5. Scroll down to the bottom, click Save.
That's it! Your SpamAssassin score is now adjusted.