Knowledge Base

How to Whitelist and Blacklist Domains in cPanel

You can blacklist (block) or whitelist (allow) domains in cPanel using two main areas:

• Email Filters / Global Email Filters
• SpamAssassin (Apache SpamAssassin)
• Email Deliverability / DNS (for advanced allow‑listing)

Below is the complete, practical guide you can apply immediately.

How to Blacklist Domains in cPanel

Method 1: Using Global Email Filters (Recommended)

Blocks emails from a specific domain for the entire cPanel account.

1. Log in to cPanel
2. Go to Email → Global Email Filters
3. Click Create a New Filter
4. Name the filter: Block Domain
5. Under Rules:
• Select From
• Select contains
• Enter the domain:
• @example.com
6. Under Actions: choose Discard Message or Reject Message
7. Save the filter

Effect: All emails from @example.com will be blocked.

Method 2: Using SpamAssassin Blacklist

1. Go to Email → Spam Filters
2. Enable SpamAssassin if not already enabled
3. Click Show Additional Configurations
4. Find Blacklist (blacklist_from)
5. Add entries like:
6. *@example.com
7. *@sub.example.net
8. Save

Effect: SpamAssassin marks these as spam or blocks them depending on your spam settings.

How to Whitelist Domains in cPanel

Method 1: Using SpamAssassin Whitelist

1. Go to Email → Spam Filters
2. Click Show Additional Configurations
3. Find Whitelist (whitelist_from)
4. Add entries like:
5. *@trusted.com
6. *@partner.org
7. Save