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Where does the Outbound Index obtain facts about outbound servers?

April 26, 2017facts index obtain outbound servers

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Where does the Outbound Index obtain facts about outbound servers?

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Facts stored in the Outbound Index come from the owners of the sender-domains and third-party verifiable sources such as Certificate Authorities, payment processors, ARIN / RIPE / APNIC/ *NIC, whois, DNS lookups, public records, publications, and mail delivery connections. Unlike traditional DNSBL blacklists, domain owners and ISPs can directly add and edit listings pertaining to the domains they control, including&#151optionally&#151the servers they authorize to send mail using their domain name, and the FQDN (Fully Qualified Domain Name) naming convention for outbound email servers “forbidden for use as outbound mail servers” IP addresses. Some of the optional checks available in the Outbound Index use data collected from publicly available sources. The Outbound Index is designed to look up, collect, cache, and correlate data related to outbound email servers, domains and their owners, which has been verified by other highly visible, known, and trusted sources.