Direct To Mx

• Direct-to-MX is a mail-delivery technique used by spammers in which mail is sent directly from the spammer's computer to the recipient's mail exchange (MX) host, bypassing any intermediate mail transfer agents.
• This has forced spammers to find other means of transmitting spam, such as direct-to-mx mailing.
• As opposed to direct mailings, which can costs cents per letter, spam costs a fraction of a fraction of a cent per message.
• Socks is a networking proxy protocol that enables hosts on one side of a SOCKS server to gain full access to hosts on the other side of the SOCKS server without requiring direct IP-reachability.
• Third, it can cause bounces and complaints to be directed to the innocent third party.
• Dig is a common network utility that lets users interact directly with name servers to get detailed information about domains and hosts.
• Others include those promising differing degrees of future happiness directly proportional to the number of people the letter is forwarded to.
• Web server logs are usually maintained in a special directory outside those of the website(s) handled by the server.
• These sites are not necessarily spam sites, but the list is provided so that you may choose not to accept email directly from them.
• Email transmitted directly from a dial-up system -- as opposed through the dial-up system's own provider -- is very likely to be spam.
• The address returned by a local name server is usually not authoritative because it probably came from the local server's cache and not directly from the authoritative name server.
• While catchall addresses are a well-intentioned feature (ensuring that any mail directed to a domain can be received and directed to someone in charge, even if the address is misspelled), they cause problems when mixed with spam and other forms of mail abuse.

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