Open Source Antispam Relay

• 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.
• Most mail host administrators have eliminated open relays, requiring either the sending host or the recipient (or both) to be within the mail host's domain, or else requiring the sending host to validate itself with a user name and password.
• Usually, open proxies are not detected until they have become so bogged-down with botnet traffic that they no longer have cpu time left to provide good performance for their owners' own tasks.
• Usually this is a mailserver set up to appear to be an open relay.
• Ndr spam uses a faked standard email non-delivery report (ndr) that a recipient will think is genuine, tricking them into opening an attachment that is spam.
• In spam terms it's a mailserver set up to appear to be an open relay, but it really isn't.
• Open Relay - An SMTP mail server used by spammers to route their bulk email through.
• Open Relays allow spammers to hide their identity.
• A pink contract will allow the spammer to send bulk email through open relays on their servers.
• You have to open the spam blocker before checking your email software, though most filters let you automate this process.
• An open socks proxy is a security hole used by spammers to hide their originating ip address.

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