Spam Removal

• If you run a website and have access to its web server logs, you can often find evidence of the activities of spambots -- they frequently leave odd signatures in the http-user-agent field.
• Second, it is a drain on resources -- a large flood of spam can crash a small server, creating a denial of service attack.
• Fourth, it damages the third party's good name when spam recipients think that the spam came from them.
• Spam cam easily be identified once you understand some key elements of spam messages.
• Usually, you can easily understand it is spam just by reading the email.
• Many software companies offer limited free trials that allow you to download a free spam blocker for a period on average of between 15 to 30 days.
• This is added to by you as within your spam filter or email software.
• A special type of hyperlink planted in an HTML-formatted spam message is called a Beacon URL; it is used to signal back to the spammer which of his recipients specifically have opened or responded to the mailing.
• Spammers continue to find open paths to unsuspecting inboxes, with the added risk of virus-infected messages a growing concern among consumers.
• A botnet is a term usually applied to a group of open proxy computers ("zombies") used for spam transmission and related tasks.
• The operator of a botnet can use its services for his own spamming, or can sell them to other spammers for profit.
• Spammers are always on the lookout for ways to make their messages pass the filters as false negatives (a spam message that is falsely tagged as non-spam and allowed to pass through a spam filter).
• A low rate of false negatives is one characteristic of an effective spam filter.
• Blocklist: A database of ip addresses or web urls suspected of being involved in spam or other abuse; generally a blocklist is not used by end-users, but is instead queried by mail hosts in order to reject or mark probable spam messages upon delivery.

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