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Block emails from specific domains

Login to WHM server as Root

On the left, select Filter Incoming Emails by Domain.

Type domains to block under Blocked Domains (1 per line).

Filter incoming emails by domain in WHM
Include subdomains for domains to block with an asterisk (*)

Select Show domains as ASCII (relevant for IDNs) to add international domain names (IDNs) if needed.

Save changes.

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