There is no doubt that spamming is unanimously treated with disgust no matter how who is facing it. However, this disgust and hatred is a little higher when we are talking about business organizations, because they are also the biggest victims of spamming. It is so rampant these days that you are reading an article that discusses the most widely used antispam ( http://www.securence.com/ ) techniques or filters. It is very important to know the kind of antispam you need for your business organization because there are so many variants within this broad sector of email security ( http://www.securence.com/solution/ ) and management. Read on to know in detail.
How Does Spam Affect Businesses?
Before we discuss the most widely used antispam techniques and the prime differences between them, let’s have a brief understanding of the way spam affects business organizations. It is said that 60% of the email communication that happens every day around the world is spam today. When we are dealing with business organizations where thousands of mails are exchanged every hour, one can imagine the amount of time, money and technical resources wasted on processing these unwanted messages. And many times, a spam won’t just be an unwanted mail but it carries harmful viruses, malwares and bots that are designed to infiltrate firewalls and infect the computers of big organizations. From server outages to leaking of sensitive information, the outcome of these security attacks could be anything. Simply put, spamming is a huge productivity killer and a genuine threat to a company’s cyber security.
Most Widely Used Antispam Techniques
• List Based Filters - List based spam filters are in fact the most widely used antispam techniques in business organizations. These lists are again sub categorized into many types based on the way the lists are prepared and operated. Blacklists, Realtime blackhole lists, Whitelists and Greylists are the four kinds of list based spam filters. These lists generally contain a number of blacklisted IP addresses that are blocked as sources of spam or IP addresses that are whitelisted as credible sources which need not be scanned. Unlike blacklists and whitelists, realtime blackhole lists are those that are constantly updated and identify the newest threats with minimum false positives. These lists are maintained by third-party vendors and offered as antispam services to organizations and enterprises.
• Content Based Filters - Unlike list based filters which block or allow certain IP addresses, this antispam technique tries to block spam by scanning the content inside each mail. In the case of word based and heuristic filters, computers look for specific keywords or phrases that are most commonly found in spam messages. Apart from looking for specific words and phrases that are fed by humans, there are also advanced antispam techniques like Bayesian filters that are equipped with machine learning and AI. These filters will learn the recurring patterns in spam messages over a period of time and update themselves to grow stronger with each learning.
• Others - Though list based and content based filters are the commonly used antispam techniques in businesses, there are also other methods such as challenge/response systems and collaborative filters that are used to counter spam.
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