Feeds

Spam busters blacklist MessageLabs and chums

'Word on the street' says Hotmail downed too

3 Big data security analytics techniques

One of the biggest spam block lists on the internet suffered an embarrassing technical cock-up today which blocked emails from some servers at web security monitoring firm MessageLabs and at some ISPs for about five hours.

The CBL (Composite Blocking List), a DNS blacklist that takes its source data from very large spamtraps and lists IP addresses of open proxies and worms/viruses, said on its website that a problem in a contributory feed spat out a number of invalid lists.

The rogue feed has now been removed and all IP addresses on the blacklist have been purged as a precautionary measure.

“Here at the CBL we take false positives extremely seriously, and we do apologise for this issue. We have taken steps to ensure this cannot happen again in future,” it said.

A spokeswoman at MessageLabs told The Register that others were affected by yesterday's false positive.

According to “word on the street”, Microsoft's Hotmail was also blocked from sending email from some of its servers for a large part of the day, she said.

MessageLabs said in an official statement:

“As soon as we were aware of the issue we worked with CBL to rectify the problem and I can confirm that our IPs have now been removed from the listing. We would recommend that any third parties ensure that their CBL list is up-to-date.”

The CBL has more about its rather embarrassing case of mistaken identity here. ®

3 Big data security analytics techniques

More from The Register

next story
Obama allows NSA to exploit 0-days: report
If the spooks say they need it, they get it
Samsung Galaxy S5 fingerprint scanner hacked in just 4 DAYS
Sammy's newbie cooked slower than iPhone, also costs more to build
Putin tells Snowden: Russia conducts no US-style mass surveillance
Gov't is too broke for that, Russian prez says
Snowden-inspired crypto-email service Lavaboom launches
German service pays tribute to Lavabit
Mounties always get their man: Heartbleed 'hacker', 19, CUFFED
Canadian teen accused of raiding tax computers using OpenSSL bug
One year on: diplomatic fail as Chinese APT gangs get back to work
Mandiant says past 12 months shows Beijing won't call off its hackers
Call of Duty 'fragged using OpenSSL's Heartbleed exploit'
So it begins ... or maybe not, says one analyst
Arts and crafts store Michaels says 3 million credit cards exposed in breach
Meanwhile, Target investigators prepare for long process in nabbing hackers
prev story

Whitepapers

Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Top three mobile application threats
Learn about three of the top mobile application security threats facing businesses today and recommendations on how to mitigate the risk.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.