Wildcarding

All fields except the policy field may accept the wildcard symbol "*". This symbol allows the mail administrator to set whitelist/blacklist rules to mask off entire domains of incoming email addresses, destination email addresses, and MTAs. SQLWhite will automatically prioritize by specificity of the rule. For example, an admin might want to blacklist an entire domain from delivering, except for one address. The rule pertaining to the exception would be chosen in priority to the general rule when an incoming email is addressed to the exception user.

NOTE: Wildcard functionality for the dest_address is restricted to this format: '*@domain.com'. Also, mta_fqdn may take on different forms. For MTA mail.foo.bar.com, valid entries can be '*.foo.bar.com', '*.bar.com', or '*'. This is so entire subdomains can be masked off.