Cpanel uses a service called SpamAssassin to help minimise the amount of spam that email accounts hosted in Cpanel receive. Sometimes SpamAssassin will not always correctly identify what is spam or not. Blacklisting an email address or domain means that no email from the relevant domain will be accepted. Whitelisting an address will do the reverse and all mail from the address or domain will be accepted.
Follow the steps below to setup ”Blacklisting” or ”Whitelisting” in Cpanel:
1. Open your web browser (Internet Explorer, Firefox or Chrome).
2. In your address bar type: http://www.(yourdomain).co.za/cpanel
3. Enter your username and password.
4. On the home page, under the ”Mail” tab, select the ”SpamAssasin” icon.
5. Click on the ”Enable SpamAssassin” icon.
6. Click on the ”Configure SpamAssassin” icon.
7. You may now ”Blacklist” or ”Whitelist” specific email addresses.
8. Enter all email addresses that you are wanting to ”Blacklist” or ”Whitelist”.
9. Click on ”save”.
Its very helpful