A Great Way to Keep Your Inbox Clean – Stop the Spam
Spam is perhaps one of the most rapidly changing forms of communication we see today. The spammers’ methods of evading detection evolve constantly, differing significantly now from what was employed even in the recent past. Content-based filtering – still a necessary part of any broad and proactive anti-spam solution – is by no means immune from their efforts. Whether based on signatures, URL blocking or heuristic rules, these filters are still sometimes thwarted by sophisticated HTML- and CSS-based obfuscation methods, or by placing the entire content of the message in randomized attached images. Spammers also tirelessly seek loopholes in domain name registration systems that allow them to avoid pre-emptive detection, and in the security measures of free web-hosting providers so they can mass-register thousands of new home pages every day.
The paper will provide an analysis of many modern anti-anti-spam techniques, accompanied by statistical reports and real-life examples. It will also outline some possible approaches to combat these often highly effective and thus increasingly ‘popular’ spam techniques. Although Internet spamming has been with us since as early as 1978 it first became more than a minor annoyance around September 1993, when America Online released AOL for Windows and the exponential expansion of the Internet began. At first, and for years subsequently, Usenet- and then email-based spam was very simple, consisting of unvarying ASCII messages sent from a limited number of IP addresses. Such simple ‘plain text’ spam required correspondingly unsophisticated approaches to blocking it. Content-based techniques such as keyword scanning and straightforward hashes (or ‘signatures’) over the message body were very effective, and at the connection level IP blocklist pioneers such as Spamhaus and MAPS helped turn spammers away before they could even ring the doorbell.
If you are signed up with one of the many free email providers, be sure to enable any provided spam filtering services. If you download your emails to an email client on your computer like Outlook or Outlook Express, consider installing spam filtering software that integrates with Outlook and other email clients.
In a business environment, email services are often hosted in house or outsourced. An organization or business may also want to standardize their email address format in a way that makes it harder for spammers to guess or discover legitimate email addresses.
Another good option for organizations that have a high volume of inbound emails is to enlist with an external to the organization spam filtering gateway service. This type of service receives all inbound emails and filters it before passing it on, majority spam free, to the final destination. An alternative to an external gateway spam filtering service would be to install spam filtering capabilities internally.
I use this trick now, and it’s saved me from spam countless times. Now only will you be protected from companies that sell your email, but you’ll be protected from companies that get hacked and lose your email address. You’ll also know the company that sold your email, and you can factor that into your mind when considering to do business with that company again.
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