Blacklist Settings

Blacklist from - blacklist_from
Used to specify addresses which send mail that is often tagged (incorrectly) as non-spam, but which the user does not want. Whitelist and blacklist addresses are file-glob-style patterns, so friend@somewhere.com, @isp.com, or .domain.net will all work. Specifically, * and ? are allowed, but all other metacharacters are not. Regular expressions are not used for security reasons. Matching is case-insensitive.
Default: empty

Examples

Blacklist an email:

test@example.com

Blacklist an entire domain:

*@example.com