Open Source Corporate Anti Spam

• The vast majority of spams are sent via direct-to-mx, usually from open proxies.
• Set your email program like microsoft outlook express to not display the preview panel (see outlook express menu item 'view' then 'layout') because just opening a spam email might be enough to send information back to the sender that your email address is valid.
• Social engineering is the act of conning email recipients into opening messages, revealing passwords or providing other confidential information by appealing to their curiosity, gullibility or computing naivety.
• Since the open proxies are controlled "by proxy" outside recognized channels, they provide effective cover for spammers.
• Open proxies now account for the vast majority of spam mail transmissions, as they make the mail much more difficult to trace to its ultimate source.
• Criminal gangs, assisted by resourceful hackers, regularly "recruit" large networks of open proxies whose services they sell to prospective spammers.
• Usually this is a mailserver set up to appear to be an open relay.
• Postfix is an open-source mail transfer agent program and is an alternative to sendmail.
• Exchange generally does not use open standard protocols (SMTP, POP, etc.
• Open proxies (a third-party computer that has been configured to serve spammers by untraceably relaying their mail, hosting or guarding their websites, or performing other tasks, often known as "bots" or "zombies") are usually individual home or business pcs (typically running some version of microsoft windows) that have not been properly secured against malware attack, and that are connected to the internet full-time via some sort of broadband connection (so they're always available to the spammer).
• Typically, the owners of such computers do not know that their machines are open proxies, since the proxy code leaves little in the way of traceable data.
• A pink contract will allow the spammer to send bulk email through open relays on their servers.
• Thunderbird (Mozilla) - an opensource competitor to Outlook Express which has gained huge support since it was launched.

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