Feeds

Spam busters blacklist MessageLabs and chums

'Word on the street' says Hotmail downed too

Internet Security Threat Report 2014

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. ®

Remote control for virtualized desktops

More from The Register

next story
'Regin': The 'New Stuxnet' spook-grade SOFTWARE WEAPON described
'A degree of technical competence rarely seen'
You really need to do some tech support for Aunty Agnes
Free anti-virus software, expires, stops updating and p0wns the world
Regin: The super-spyware the security industry has been silent about
NSA fingered as likely source of complex malware family
You stupid BRICK! PCs running Avast AV can't handle Windows fixes
Fix issued, fingers pointed, forums in flames
Privacy bods offer GOV SPY VICTIMS a FREE SPYWARE SNIFFER
Looks for gov malware that evades most antivirus
Patch NOW! Microsoft slings emergency bug fix at Windows admins
Vulnerability promotes lusers to domain overlords ... oops
HACKERS can DELETE SURVEILLANCE DVRS remotely – report
Hikvision devices wide open to hacking, claim securobods
prev story

Whitepapers

Choosing cloud Backup services
Demystify how you can address your data protection needs in your small- to medium-sized business and select the best online backup service to meet your needs.
Forging a new future with identity relationship management
Learn about ForgeRock's next generation IRM platform and how it is designed to empower CEOS's and enterprises to engage with consumers.
Seattle children’s accelerates Citrix login times by 500% with cross-tier insight
Seattle Children’s is a leading research hospital with a large and growing Citrix XenDesktop deployment. See how they used ExtraHop to accelerate launch times.
5 critical considerations for enterprise cloud backup
Key considerations when evaluating cloud backup solutions to ensure adequate protection security and availability of enterprise data.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?