Deprecated: mysql_connect(): The mysql extension is deprecated and will be removed in the future: use mysqli or PDO instead in /home/a26f9f83/public_html/articles/includes/config.php on line 159
How Spammers Fool Whitelists - And How to Stop Them > NetSparsh - Viral Content you Love & Share

How Spammers Fool Whitelists - And How to Stop Them

Effectively stopping spam over the long-term requires much more than blocking individual IP addresses and creating rules based on keywords that spammers typically use. The increasing sophistication of spam tools coupled with the increasing number of spammers in the wild has created a hyper-evolution in the variety and volume of spam. The old ways of blocking the bad guys just don't work anymore.

Examining spam and spam-blocking technology can illuminate how this evolution is taking place and what can be done to combat spam and reclaim e-mail as the efficient, effective communication tool it was intended to be.

One method used to combat spam is whitelisting. Whitelists are databases of trusted email sources. The list may contain specific email addresses, IP addresses or trusted domains. Emails received from a whitelisted source are allowed to pass through the system to the user's email box. The list is built when users and email administrators manually add trusted sources to the whitelist. Once built, the catch-rate for spam can be close to 100%, however, whitelists produce an inordinate number of false positives.

It is virtually impossible to produce an exhaustive list of all possible legitimate email senders because legitimate email can come from any number of sources. To get around this difficulty, some organizations have instituted a challenge-response methodology. When an unknown sender sends an email to a user's account, the system automatically sends a challenge back to the sender. Some challenge-response systems require the sender to read and decipher an image containing letters and numbers. The image is designed to be unreadable by a machine, but easily recognizable by a human. Spammers would not spend the time required to go through a large number of challenge-response emails, so they drop the address and move on to those users who don't use such a system.

Whitelists are only partially successful and impractical for many users. For example, problems can arise when users register for online newsletters, order products online or register for online services. If the user does not remember to add the new email source to their whitelist, or if the domain or IP address is entered incorrectly, the communication will fail. Additionally, whitelists impose barriers to legitimate email communication and are viewed by some as just plain rude.

Whitelists are not widely used by email users and administrators as a primary tool to fight spam because of the high number of false positives, and the difficulties in creating a comprehensive list of email sources. Because whitelists are not widely used, spammers typically do not develop countermeasures. As with other spam fighting techniques, whitelists are most effective when used in conjunction with other anti-spam tools.

The Solution

When used individually, each anti-spam technique has been systematically overcome by spammers. Grandiose plans to rid the world of spam, such as charging a penny for each e-mail received or forcing servers to solve mathematical problems before delivering e-mail, have been proposed with few results. These schemes are not realistic and would require a large percentage of the population to adopt the same anti-spam method in order to be effective. You can learn more about the fight against spam by visiting our website at www.ciphertrust.com and downloading our whitepapers.

Dr. Paul Judge is a noted scholar and entrepreneur. He is Chief Technology Officer at CipherTrust, the industry's largest provider of enterprise email security. The company's flagship product, IronMail provides a best of breed enterprise anti spam solution designed to stop spam, phishing attacks and other email-based threats. Learn more by visiting http://www.ciphertrust.com/prod ucts/spam_and_fraud_protection today.

In The News:

This RSS feed URL is deprecated, please update. New URLs can be found in the footers at https://news.google.com/news

Daily Beast

The New Google Pixel 3 Is Available for Pre-Order
Daily Beast
Pixel 3 comes with a fast-charing battery, newly upgraded (and familiar) Portrait Mode, AR capabilities through Google Lens, and even a spam blocker built-in. If you're anti-Apple, this is your answer. Scouted is here to surface products that you might ...


Heavy.com

11 Best Google Pixel 3 XL Cases: The Ultimate List (2018)
Heavy.com
Successful devices like the Google Home smart speaker and the Daydream VR headset, plus new software like their latest spam blocker show that Google is on the cutting edge of smartphone tech. It also helps that this year's phones finally support ...
YouTube HTML5 Video PlayerYouTube

all 600 news articles »

Download.com (blog)

Truecaller anti-spam app adds WhatsApp-like text messaging platform
Download.com (blog)
Today, one popular spam call blocker app called Truecaller (Android, iOS) announced that it's integrated a full-fledged chat messenger alongside its pre-existing features. Called simply Truecaller Chat, it's a self-contained chat platform like WhatsApp ...
Truecaller Launches Chat Feature to Combat Fake News | Truecaller BlogTruecaller Blog

all 70 news articles »

Slate Magazine

Google's New Pixel 3 Phone Can Fight Robocalls With Roboreplies
Slate Magazine
Google is giving phone users the option to spam their spammers. The new Pixel 3 smartphone, which the company unveiled on Tuesday, features a virtual assistant that can help screen out robocalls by responding to the automated calls with its own ...
YouTube HTML5 Video PlayerYouTube
Meet Google Pixel 3YouTube

all 3,454 news articles »

Prestashop block user/bot by IP, country or user agent - Knowband Addon
WhaTech
For eCommerce sites, security is an important concern. With the increasing use of eCommerce sites to purchase online goods and services, spam possibilities are also subsequently increasing. Web merchants should find an intuitive way to secure their ...


Patch.com

Block Unwanted Calls For Good With This Genius Gadget
Patch.com
The ODSEN call blocker can block up to 4,000 numbers, and if you ever accidentally block someone's number, there's a "delete" button you can press twice to let them back through to your line. So when you're ready to boot the bots and say goodbye to ...


The Verge

How to stop annoying robocalls on your iPhone or Android phone
The Verge
AT&T has a free app, Call Protect, that's designed to block some fraudulent robocalls from reaching you, and you won't have to do anything besides install the software on your phone. It won't completely block spam or telemarketer calls, however ...


New York Times

How to Block and Report Spam Calls and Text Messages
New York Times
Telemarketers have been a thorn in the side of humankind for decades. And while technology offers more options for blocking unwanted calls, it also makes spammers more agile than ever before. Here's what to do when you get a spam call or text message, ...


Wall Street Journal

4 Smartphone Apps That Aggressively Block Spam Calls
Wall Street Journal
To block nuisance calls more effectively, turn to apps, which use vast databases of bogus phone numbers and “spam protection engines” to better call out frauds. They briskly divert most—if not all—of those spammers to voice mail. One app also fights ...


Small Business Trends

10 Best Call Blocker Apps to Prevent Nuisance Calls to Your Small Business
Small Business Trends
The number of spam calls being made to mobile phones and landlines is on the rise around the world. A study by Truecaller shows the U.S. is the second most affected country by spam calls, with users, on average, receiving 20.7 nuisance calls each month.

Google News

Get Your News Releases Through the Spam Filters in 11 Easy Steps

In today's spam-filled email world, it's sometimes VERY difficult to... Read More

Managing Spam in 2005

In 1998, nearly 10% of all email traffic on the... Read More

The Vanishing Mail

Am I Just Being Paranoid Or Are The Robots Out... Read More

Pst... Pass It On... I Found Out Its a Hoax

When you receive an email telling you about a virus,... Read More

How Spammers Fool Bayesian Filters - And How to Stop Them

Effectively stopping spam over the long-term requires much more than... Read More

How To Stop Spam

I imagine you have seen, heard about, or already know... Read More

ANTI-S*P^A#M: Protecting Your Web Sites Email Address(es)

Did you know that there are software programs that view... Read More

Stop Spam! New Spam Blockers

News last week that Internet service provider Verizon settled its... Read More

Email Chain Letters - Harmless Fun or Not?

I'm sure I'm not the only person on the planet... Read More

Winning the War On Spam

For years I didn't worry much about spam.But lately it's... Read More

The Definition of Spam

Spam can bring down your website faster than a speeding... Read More

Stop Spam: How To Escape The Spam Hell-Hole

If you're anything like me, you're pretty sick of it,... Read More

Invasion of the Email Snatchers

They're sneaky. And stealthy. They're quiet and mostly unobtrusive, but... Read More

What to Do to Avoid Getting Banned

How would you feel if you found a link on... Read More

How To Identify Spam

Most of us have opened our email program and found,... Read More

Blackhole or Fail - Which One Is Better For Your Mail Server?

Very often SPAMMERS take advantage of catch-all email setup on... Read More

Challenge Response Spam Filters Explained

As the flood of spam increases end users are looking... Read More

Block Spam with An Easy Behavioral Change

E-mails now have a connection back to their servers. I... Read More

How Spammers Fool Spam Blacklists - And How to Stop Them

Effectively stopping spam over the long-term requires much more than... Read More

Bayesian Spam Filters Explained

In a word Bayesian spam filters are "intelligent". Bayesian spam... Read More

A Practical Approach to Eliminate Spam

Spam is out of control! I guess that would be... Read More

Spam eMails Are Not Just Annoying - They Are A Main Distributor Of Viruses

Why is someone from India, Africa, or elsewhere writing you... Read More

The Great Spam Scam: Five Strategies To Stop Brand and Revenue Robbery

Marketers usually think of anti-spam tactics as 'how to prevent'... Read More

Where Did The Word Spam Come From?

We've all become familiar with the term spam. It's become... Read More

Sick Of Wading Through Spam?

It's a nightmare isn't it? You fire up your email... Read More