libmail-spf-query-perl ソースパッケージをダウンロード:
The Sender Policy Framework (SPF) protocol relies on sender domains to publish a DNS whitelist of their designated outbound mailers. This module, given an envelope sender, determines whether a given client IP address is a legitimate mail source.
This package also includes spfquery, a command line interface to the module, and spfd, a query proxy for some mail server configurations.
For more information on SPF, see <http://www.openspf.org>.
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