How Spammers Fool Spam Blacklists - 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 blacklisting. The goal of blacklisting is to force Internet Service Providers (ISPs) to crack-down on customers who send spam. A blacklisted ISP is blocked from sending email to organizations. When an ISP is blacklisted, they are provided with a list of actions they must take in order to be removed from the blacklist. This controversial method blocks not just the spammers, but all of the ISP's customers. Blacklisting is generally considered an unfriendly approach to stopping spam because the users most affected by the blacklist are email users who do not send spam. Many argue blacklisting actually damages the utility of email more than it helps stop spam since the potential for blocking legitimate email is so high.

In addition to the ethical considerations, there are other problems with blacklists. Many blacklists are not updated frequently enough to maintain effectiveness. Some blacklist administrators are irresponsible in that they immediately block suspect servers without thoroughly investigating complaints or giving the ISP time to respond. Another downside is that blacklists are not accurate enough to catch all spam. Only about half of servers used by spammers, regardless of how diligent the blacklist administrator may be, are ever cataloged in a given blacklist.

Blacklists are used because they can be partially effective against spammers who repeatedly use the same ISP or email account to send spam. However, because spammers often change ISPs, re-route email and hijack legitimate servers, the spammer is a moving target. Blacklist administrators are forced to constantly revise lists, and the lag-time between when a spammer begins using a given server and when the blacklist administrator is able to identify the new spam source and add it to the blacklist allows spammers to send hundreds of millions of emails. Spammers consider this constant state of flux a part of doing business and are constantly looking for new servers to send spam messages.

When used individually, each anti-spam technique has been systematically overcome by spammers. Blacklists have some utility in stopping known spammers, but they may also block valid emails. Because of their limitations, blacklist data should only be used in conjunction with other sources to determine if a given message is spam. 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.

The Solution

Reputation systems offer a comprehensive anti spam solution by dynamically updating black and whitelists based on sender behavior. These systems also automatically update and score messages thereby removing the burden from administrators. Today's spammers are more clever than ever, so today's reputation systems must be equally sophisticated. An effective reputation system must be dynamic, comprehensive, precise, and based on actual enterprise mail traffic in order to keep the spammers from gaining any advantage. 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/products/spam_and_fraud_protection today.





Latest News:




Warning: MagpieRSS: Failed to parse RSS file. (syntax error at line 1, column 0) in /home2/jsteiner/public_html/scholarlyarticles.org/spam-blocker/magpierss/rss_fetch.inc on line 238
Site:

Warning: Invalid argument supplied for foreach() in /home2/jsteiner/public_html/scholarlyarticles.org/spam-blocker/inc/ads-body.inc on line 34


Site: news - Google News
This RSS feed URL is deprecated
This RSS feed URL is deprecated, please update. New URLs can be found in the footers at https://news.google.com/news Mueller issues Steve Bannon subpoena in special counsel Russia probe - Fox News

Fox News

Mueller issues Steve Bannon subpoena in special counsel Russia probe
Fox News
A spokesperson for Mueller did not immediately respond to Fox News' request for comment. Revelation of the Bannon's subpoena came as the onetime Breitbart News executive chairman testified behind closed doors on Capitol Hill Tuesday. Bannon appeared ...
Trump Russia: Bannon 'ordered to testify to grand jury'BBC News
Bannon Is Subpoenaed in Mueller's Russia InvestigationNew York Times
House committee to question WH Communications Director Hope HicksNBCNews.com
The Guardian
all 265 news articles »
Trump blames Democrats for looming government shutdown - NBCNews.com

NBCNews.com

Trump blames Democrats for looming government shutdown
NBCNews.com
President Donald Trump pre-emptively blamed Democrats for the prospect of a government shutdown, pointing to party leaders' demands regarding an immigration deal just four days before funding is set to run out. "The Democrats want to shut down the ...

and more »
4 South Carolina officers shot, leaving 1 in 'very critical' condition; suspect arrested - Fox News

CBS News

4 South Carolina officers shot, leaving 1 in 'very critical' condition; suspect arrested
Fox News
We really could use your thoughts and prayers," York County Sheriff's spokesman Trent Faris said in a news conference Tuesday afternoon. McCall, a father of three children, was previously arrested in 1994 and was charged with assault, resisting arrest ...
Four cops shot during manhunt in South CarolinaCBS News

all 102 news articles »
Recode Daily: Facebook's breakup with news, explained - Recode

Recode

Recode Daily: Facebook's breakup with news, explained
Recode
Here's a round of responses to Facebook's move away from news: On Friday, CEO Mark Zuckerberg announced that the social media site will prioritize content from friends and family over content from brands and professional publishers; live and news video ...

Larry Nassar case: Victims confront 'repulsive' predator - BBC News

BBC News

Larry Nassar case: Victims confront 'repulsive' predator
BBC News
A former babysitter who was abused by ex-Team USA gymnastics sports doctor Larry Nassar has told him in court: "You are a repulsive liar." Kyle Stephens was the first of nearly 100 women to testify against the 54-year-old this week as he is sentenced ...
Sex-abuse victims face gymnastics doctor Larry Nassar at sentencingNBCNews.com
Gymnastics star Simone Biles says Larry Nasser sexually abused herFox News
Simone Biles - TwitterTwitter
CNN
all 353 news articles »
Neighbors describe shock of learning 13 siblings allegedly held captive by parents - CBS News

BBC News

Neighbors describe shock of learning 13 siblings allegedly held captive by parents
CBS News
A married couple near Los Angeles is accused of holding their 13 children captive in their home and are facing charges of torture and child endangerment. Police say they were tipped off by a teenage daughter after she escaped from her parents, David ...
13 siblings ages 2 to 29 'held captive' by parents, some shackled, officials sayABC News
Turpin: Shackled siblings found in Perris, California homeBBC News
California parents arrested after 13 children found shackled, held captive in their Perris homeNBCNews.com
Fox News -KABC-TV -BBC News -New York Times
all 387 news articles »
McDonald's aims for fully recycled packaging by 2025 - BBC News

BBC News

McDonald's aims for fully recycled packaging by 2025
BBC News
In the UK, sites no longer use foam packaging and more than 1,000 restaurants have recycling bins for plastics and paper cups. However, the world's biggest restaurant chain, which has 37,000 sites worldwide, said some restaurants might struggle to ...

and more »
Hubble scores unique close-up view of distant galaxy - BBC News

BBC News

Hubble scores unique close-up view of distant galaxy
BBC News
The detail evident in the image will help scientists to test theories of galaxy evolution. "Pretty much every galaxy at that distance is an unresolved dot... it's kind of a matter of luck to get a galaxy that's lensed in just the right way to stretch ...

and more »
Carillion directors to be investigated - BBC News

BBC News

Carillion directors to be investigated
BBC News
The government has ordered a fast-track investigation into directors at the failed construction firm Carillion. The UK's second biggest construction firm went into liquidation on Monday, after running up losses on contracts and struggling with heavy ...

and more »
Sneezing myths and facts - BBC News

BBC News

Sneezing myths and facts
BBC News
Sneezing is an involuntary reflex that all humans have but we still understand relatively little about. Following on from the news that stifling a sneeze by clamping your nose and mouth shut can cause serious physical damage, we explore some sneezing ...

and more »

MORE RESOURCES:

Warning: MagpieRSS: Failed to parse RSS file. (syntax error at line 1, column 0) in /home2/jsteiner/public_html/scholarlyarticles.org/spam-blocker/magpierss/rss_fetch.inc on line 238
Site:

Warning: Invalid argument supplied for foreach() in /home2/jsteiner/public_html/scholarlyarticles.org/spam-blocker/inc/rss.php on line 9
Site: spam blocker - Google News
This RSS feed URL is deprecated
This RSS feed URL is deprecated, please update. New URLs can be found in the footers at https://news.google.com/news NEM Coin Price SkyRocketed & Ranks 7th Place in the Coin Market ... - QNT

QNT

NEM Coin Price SkyRocketed & Ranks 7th Place in the Coin Market ...
QNT
The NEM developers are pseudonymous. NEM was started by a Bitcoin Talk forum user called UtopianFuture who was inspired by Nxt. The initial plan for NEM was to create a fork of NXT, but this was eventually dismissed in favor of a completely new ...

and more »
Stop spam calls with the best call- and text-blocker apps - Digital Trends

Digital Trends

Stop spam calls with the best call- and text-blocker apps
Digital Trends
Unwanted calls and texts are a serious problem. There were almost 30 billion robocalls in the U.S. last year according to YouMail research. Thankfully, the Federal Communications Commission is acting to try and protect consumers from unwanted ...

Digital publishers cry foul as Google exerts more control over an industry it already dominates - Times of India

Times of India

Digital publishers cry foul as Google exerts more control over an industry it already dominates
Times of India
Here's how the new Chrome browser ad blocking set-up will work: Chrome will have an ad blocker turned on by default. This will block "disruptive" or "intrusive" ads on web pages. Industry body Coalition for Better Ads (CBA), which Google joined this ...
Microsoft removes Google's Chrome installer from the Windows StoreThe Verge
An update on Better Ads | Web | Google DevelopersGoogle Developers

all 97 news articles »
Best Android Antivirus Apps for 2018 - Laptops.co.uk

Best Android Antivirus Apps for 2018
Laptops.co.uk
For example, security software can include anti-theft features. Although it can't stop the phone's hardware from being stolen, certain programmes can lock and/or delete data from the phone so that personal and important information can be protected ...

and more »
How To Block Robocalls: Automated Calls Are Rising, Here's How ... - International Business Times

International Business Times

How To Block Robocalls: Automated Calls Are Rising, Here's How ...
International Business Times
The Federal Trade Commission reported complaints about robocalls reached a new high in 2017. Here's how to block the unwanted calls from ringing your phone.

and more »
BT's spam blocker IDs accident claims as top nuisance call ? The ... - The Register

The Register

BT's spam blocker IDs accident claims as top nuisance call ? The ...
The Register
BT's free spam filter, launched earlier this year to crack down on nuisance calls, has identified accident claims as the worst offender for nuisance calls with 12 million made in the first week of March. Some two million customers have signed up to the ...

and more »
T-Mobile's spam call blocking is coming to MetroPCS - The Verge - The Verge

The Verge

T-Mobile's spam call blocking is coming to MetroPCS - The Verge
The Verge
Back in March, T-Mobile introduced Scam ID and Scam Block, two features that help users avoid annoying robocalls, and now it's bringing the service to MetroPCS. Starting tomorrow, all MetroPCS users will automatically get Scam ID, the feature that ...
MetroPCS Fights Spam Calls Through Scam ID, Scam BlockAndroid Headlines
MetroPCS customers get Scam ID and Scam Block this weekTmoNews
Scam ID and Scam Block coming to Metro PCS to stop scammers ...9to5Mac
T-Mobile Newsroom
all 19 news articles »
Verizon is charging for anti-spam features T-Mobile and AT&T give away for free - The Verge

The Verge

Verizon is charging for anti-spam features T-Mobile and AT&T give away for free
The Verge
More important, however, is the fact that competing carriers offer robocall and spam warnings to their subscribers for free. T-Mobile, for instance, even does so on a network level, so you don't have to download an extraneous app. T-Mobile announced ...

and more »
How to Stop Spam Calls Before You Kill Your Phone - Gizmodo

Gizmodo

How to Stop Spam Calls Before You Kill Your Phone
Gizmodo
Nomorobo, which is used by some carriers, just launched on iOS and identifies spam calls in a similar way?it will set you back $1.99 a month, but unlike Hiya, it won't touch your contacts or call history. Meanwhile, Should I Answer? is free for ...

ESET Internet Security review: A highly rated security suite with an eye on the connected home - PCWorld

PCWorld

ESET Internet Security review: A highly rated security suite with an eye on the connected home
PCWorld
There are options for turning on and off the service's gamer mode, webcam protection, email and spam monitoring, botnet protection, and other security tools. On top of the interface features, ESET also has a pop-up that appears each time you insert a ...

Home | Site Map | Resource Links