Exchange Sender Callouts

• 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.
• Microsoft's trade name for its proprietary e-mail management system is EXCHANGE, popular among large corporations or institutions that use Microsoft softwares.
• Exchange is the system for your company's e-mail and not the program you use to pick up your mail.
• Exchange is supported primarily by Microsoft's Outlook mail client, and by an increasing number of non-Microsoft clients as well.
• Exchange generally does not use open standard protocols (SMTP, POP, etc.
• Spam recipients who use exchange-based mail services are at a relative disadvantage in tracing spam messages, since exchange clients often make it difficult to see smtp headers, and will often munge the format of messages and of complex mime-based e-mail bodies.
• Spam recipients who use Exchange-based mail services are at a relative disadvantage in tracing spam messages, since Exchange clients often make it difficult to see SMTP headers.
• A pink contract is a secret agreement between an ISP and a spamming customer in which the ISP agrees to waive or weaken its published anti-spam policies in exchange for significantly higher fees.
• This MTA will then transfer the message to a mail exchanger (MX) for the recipient's domain, identified via a DNS lookup.
• Microsoft Exchange - Part of the Windows Server line of products Exchange is a collaborative software product which handles email, calendars and daily tasks amongst other things.
• The sender policy framework (SPF) is a set of procedures that allows mail providers to exchange information in real time on who they permit to send mail and from which hosts.
• Graylisting is a technique used by a mail exchanger host to defend against spam deliveries by temporarily rejecting all mail from unrecognized sources.

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