Twitter implements DMARC standard to fight phishing

The new technology will help email providers detect and block emails with a spoofed twitter.com sender address

Twitter has implemented DMARC, a standard for preventing email spoofing, in order to make it harder for attackers to send phishing emails that appear to come from twitter.com addresses.

Twitter users are constantly targeted in phishing attacks that try to pass rogue emails as official communications from the company. These phishing emails direct users to fake Twitter websites in order to steal their login credentials.

"Earlier this month, we began using a new technology called DMARC that makes it extremely unlikely that most of our users will see any email pretending to be from a Twitter.com address. DMARC is a relatively new security protocol created by a group of organizations to help reduce the potential for email-based abuse," said Josh Aberant, Twitter's postmaster, Thursday in a blog post.

DMARC, short for "Domain-based Message Authentication, Reporting & Conformance," is a standard for implementing the SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail) email message validation and authentication systems.

The technologies can be used to verify that an email with a sender address of, for example, twitter.com actually came from servers authorized to send email on behalf of twitter.com. The goal of DMARC is to achieve a uniform implementation of these systems among the top email services providers and other companies that would benefit from email validation.

DMARC is supported by all four major email providers -- Google (Gmail), Microsoft (Outlook.com/Hotmail), Yahoo (Yahoo Mail) and AOL. It has also been implemented by services like Facebook, PayPal, Amazon and now Twitter.

While Twitter's support for DMARC will help email providers block messages with forged @twitter.com addresses from reaching the inboxes of many users, it won't prevent phishing emails that masquerade as Twitter communications but have non-twitter.com sender addresses. This means that users should remain vigilant and scrutinize all details of emails received from Twitter before acting on their instructions.

DMARC celebrated its one-year anniversary earlier this month, but according to DMARC.org, the industry group that oversees the standard's development and adoption, it already helps protect 60 percent of the world's email boxes from spam and phishing. More than 325 million spoofed messages were rejected in November and December 2012 because leading email providers and email senders implemented DMARC, the group said on its website.

Tags: Internet-based applications and services, online safety, antispam, social networking, internet, Facebook, AOL, Yahoo, Google, security, Microsoft, Mail, twitter, scams, social media

Coding error protects some Android apps from Heartbleed

READ THIS ARTICLE
DO NOT SHOW THIS BOX AGAIN [ x ]
Comments are now closed.
CSO Corporate Partners
  • Webroot
  • Trend Micro
  • NetIQ
rhs_login_lockGet exclusive access to CSO, invitation only events, reports & analysis.
CSO Directory

Endpoint Management Solutions

Endpoint Security Management

Latest Jobs
Security Awareness Tip

Incident handling is a vast topic, but here are a few tips for you to consider in your incident response. I hope you never have to use them, but the odds are at some point you will and I hope being ready saves you pain (or your job!).


  1. Have an incident response plan.

  2. Pre-define your incident response team 

  3. Define your approach: watch and learn or contain and recover.

  4. Pre-distribute call cards.

  5. Forensic and incident response data capture.

  6. Get your users on-side.

  7. Know how to report crimes and engage law enforcement. 

  8. Practice makes perfect.

For the full breakdown on this article

Security ABC Guides

Warning: Tips for secure mobile holiday shopping

I’m dating myself, but I remember when holiday shopping involved pouring through ads in the Sunday paper, placing actual phone calls from tethered land lines to research product stock and availability, and actually driving places to pick things up. Now, holiday shoppers can do all of that from a smartphone or tablet in a few seconds, but there are some security pitfalls to be aware of.