How to Blacklist an Email Address in cPanel
When a particular sender or domain keeps sending junk that slips past filters, blacklisting marks their mail as spam automatically.
Step-by-step
- Open Email → Spam Filters in cPanel.
- Click "Show Additional Configurations" → "Edit Spam Blacklist Settings" (blacklist_from).
- Add the address or domain — e.g. spammer@example.com or *@example.com for the whole domain.
- Click Update Blacklist (blacklist_from). Matching mail is now scored as spam.
- For outright rejection, create an email filter with a Discard action on that sender.
- Review periodically and remove entries you no longer need.
💡 Good to know
- Blacklisting marks mail as spam; a Discard filter deletes it outright — choose based on how sure you are.
- Spammers change addresses often, so blacklisting one address has limited lifespan — domain-level rules last longer.
- Tune your overall spam settings for broader protection.