open source antispam relay

Open Source Antispam Relay

Portal sites are often open proxy machines belonging to unknowing home users.
An open proxy is 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.
Honeypots are used in the study of open proxies and other spam-related phenomena.
An open proxy computer ("zombie") that is used for transmitting spam e-mail or supporting spam websites.
Beacon URL: A special type of hyperlink planted in an html-formatted spam message; it is used to signal back to the spammer which of his recipients specifically have opened or responded to the mailing.
"Connection identifiers are typically an identifier associated with a password allowing to log on the Internet, as well as sending or receiving messages and open access to on-line services.
Spammers continue to find open paths to unsuspecting inboxes, with the added risk of virus-infected messages a growing concern among consumers.
Open Relay: an smtp email server that allows the third-party relay of email messages.
These are often open proxy machines belonging to unknowing home users.
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.
Spam Tip: Never open spam or attachments in a spam email.