How to Setup Allowlist / Blocklist to block SPAM for VPS running Plesk
This knowledge article will show you how to use allowlist and blocklist to block SPAM :
1. Login to your Plesk Control Panel
2. After logging in, click on "Tools and Settings" on the left navigation bar.
3. Next, click on the Mail Server Settings under the Mail subheading.
4. Next, click on the "Block List" tab.
5. Next click on the "Add Domain" button.
6. Finally, enter the domain name you want to be blocked. (e.g. domain.com)
7. To save your changes, click on the "OK" button.