Ip Reputation Service Microsoft

• When the mail host queries a DNSBL for a particular host name or address, it receives not an IP address, but a coded answer resembling an IP address.
• A basic IP network utility that uses the internet control message protocol (ICMP) to determine whether a machine at a remote IP address can be reached from a local machine is called a ping and can be used to test a network connection.
• Dns blocklist: A list of ip addresses which are listed for spam or spam support.
• If a sender's ip appears in a blocklist, the mail host can reject delivery of the message so that it will not show up in the recipient's inbox.
• The IP address is independent of any host names or domain names that a machine might have; the linkage between addresses and names is maintained in the domain name service (DNS).
• A name server that is assigned within DNS to be responsible for knowing the IP addresses of all hosts in a given domain is called an authoritative name server.
• You can sometimes track spammers to particular ip addresses that they use (for sending mail or for maintaining websites); you can then use whois lookups to determine the owners of the netblocks in which these addresses appear, and then report the abuse to these parties, or to the upstream provider responsible for having sold the block.
• The dul is a list of known dial-up ip addresses.
• It can return the IP addresses of host names or aliases that are submitted to it.
• Since the numeric ip address of the sending host is known to the receiving host (it comes from the basic ip socket transaction), it can be matched to the helo name using dns lookups; if the match fails, it's pretty conclusive evidence of header forgery.
• A host is a computer that has a connection to an IP network and can provide various network services.
• It is also the name of a command on Unix operating systems that can perform DNS lookups to get the IP address associated with a host name or alias (or vice-versa).
• IP (internet protocol) is the set of communications procedures (officially defined in IETF RFC 791) that underlie the internet.
• IP provides for the transfer of packets of data between computers on large networks.

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