The key differences between Sender Policy Framework and Sender ID
by DuoCircle
The primitive version of SMTP (Simple Mail Transfer Protocol) didn’t have a feature to verify the email sender’s authenticity, leaving room for phishing and spoofing instances. Over time, emails became one of the most exploitable attack vectors. It was easier for threat actors to modify the ‘From’ field in an email to impersonate banks, governments, and well-known brands. They would send millions of potentially fraudulent emails each day, urging recipients to ‘reset their password’ or ‘verify their account,’ leading to credential theft.
Zip Flaw Exploited, Meta Confirms Spyware, ENGlobal Ransomware Outage – Cybersecurity News [February 03, 2025]
by DuoCircle
Cyber threats are becoming more sophisticated with each day passing by, attacking individuals and businesses unpredictably. This week’s security news covers news pieces directly curated from authentic sources. We will discuss how a new exploit in 7-Zip allowed attackers to bypass Windows security and how Meta identified a spyware attack on 90 journalists and activists.
Everything you need to know about setting up email authentication on Mailchimp!
by DuoCircle
If you want your emails to reach your subscribers’ inboxes without any hassle, setting up email authentication for your authorized domain is something you can’t afford to ignore. Domain authentication enables you to send out your emails to the right inbox. It also enables you to maintain your subscriber base and grow them eventually by keeping them actively engaged.
How does DKIM alignment affect overall DMARC compliance?
by DuoCircle
DMARC is based on SPF and DKIM results. For an email to pass the DMARC checks, it has to pass at least one of the protocols and have alignment with the domain in the ‘From’ header.
Data accuracy: What is it, and how can authentication protocols help?
by DuoCircle
Every organization thrives on data— whether it is your customers’ details, financial transactions, or some kind of operational records. This data not only tells you about what is going on in your organization but is also crucial to making strategic decisions or even undertaking everyday operations. So, data is essentially the backbone of your organization. But remember, this data is only valuable when it is accurate. Any discrepancy in the information can have a domino effect on basically everything that is going on in your company.
DeepSeek AI Cyberattacks, Health Provider Breached, Telecom Data Impact – Cybersecurity News [January 27, 2025]
by DuoCircle
This week we are back with recent cybersecurity news pieces that highlight an exponential surge in cybersecurity threats proving to redefine the digital realm. Ranging from a leading AI platform limiting signups after a series of targeted cyberattacks, to a healthcare data breach that exposed millions of sensitive information.
Learning to leverage Google Postmaster tools the right way to monitor the performance of your IPs
by DuoCircle
A late 2023 poll found that over half of marketing professionals saw their email marketing ROI double, proving why email has remained a powerful tool since its launch in the 1970s. Now that more brands rely on email marketing for their brand growth, staying relevant in recipients’ inboxes is a challenge. The engagement rate shows positive growth only if your content is meaningful for the receivers. It’s all about figuring out what type of audience likes what and serving them exactly that. (more…)
How to discover source owners using the ‘envelope_to’ domain?
by DuoCircle
An envelope_to domain is the domain of the recipient’s email address. So, if we shoot an email to someone@sample.com, then sample.com is the envelope_to domain. Now, let’s quickly recall what RUA reports are to understand the concept fully. So, RUA or aggregate DMARC reports are XML-based reports that are sent by the receiving server to the email address specified in the DMARC policy. It includes details like-
Have you already implemented DMARC but still think there’s a possibility of phishers slipping your email ecosystem and sending fraudulent emails on your behalf?
This week, in our ongoing coverage of cybersecurity news, we take a closer look at recent cybersecurity news, threats, and innovative solutions impacting the virtual landscape. We tried covering everything ranging from coordinated cyberattacks on municipalities and banks to growing national security fears as we examined the vulnerabilities that threaten critical sectors. We’ll also cover why ransomware is such a growing threat to critical infrastructure and how co-opetition is becoming a major theme in cybersecurity. We will conclude with a highlight of the strategic alliance between Cognizant and CrowdStrike that enhances enterprise defense against emerging cyber threats.
Building Brand equity over time is very expensive and valuable. Bad actors spoof these well-known brands to attempt to steal from unsuspecting people who believe the email is coming from a known Brand.
VeriSend is a software-as-a-service designed to be an independent third-party verification system that allows email providers the ability to add Brand logos to email messages.
We maintain a service that allows mail providers to display valid Brand logos when legitimate mail is received.
VeriSend protects the brand by displaying the Brand’s logo for Valid EMail.
Mail recipients know to “look for the logo”. If they see the Brand logo, they can trust the message is from their favorite brand.
Conversely, it they do not see the Brand logo, it is a fake message, 100% of the time!
Email is a wonderful way to communicate and a fantastic business tool that allows nearly instantaneous delivery at near zero cost.
Unfortunately, anonymity and forgery have restricted the full potential of email to be a trusted method deliver a wide variety of information.
I have been working for 3 years to use verifiable message metadata cross referenced against a Library of Known Good Senders assists in 100% sure identification of Good Senders and of individual messages.
Read my whitepaper here:
Verisend: Restoring Confidence to Email with Verifiable Sender Identities
Understanding the concept of fallback mechanisms in Sender Policy Framework
by DuoCircle
Sometimes, when an email doesn’t pass the SPF authentication checks, the receiving server or policies offer better ways to handle or mitigate the failure. This is done using fallback mechanisms— a way to secure email communication without hampering the flow and productivity. (more…)
Yahoo Japan has mandated DMARC and domain authentication
by DuoCircle
In November 2023, Yahoo announced that by February 1st, 2024, any company that sends more than 5,000 emails per day has to deploy DMARC to minimize the risk of email-based spoofing, phishing, and ransomware. After this announcement, the rate of DMARC adoption surged, and now Yahoo Japan has also made DMARC and domain authentication mandatory for users as of December 2024. Experts see this as a great opportunity to improve companies’ email security posture.(more…)
Back in 2024, email service providers such as Google and Yahoo rolled out new email-sending policies. One would have thought that organizations would begin to take email security more seriously, but so far, that hasn’t been the case. In fact, cybersecurity experts have found that phishing attacks have shot up, with the number of phishing messages increasing by 202% in the second half of 2024.
Cybercriminals are enhancing their capabilities, as evidenced by the latest PhishPWP phishing threat. Similarly, this week’s cybersecurity bulletin highlights the latest ransomware attack on AWS servers, making recovery impossible without the attacker’s key. We also look at how cybercriminals use popular social media channels like Telegram. Zero-day attacks are the most dangerous of all, as they emerge from practically nowhere. This week’s news highlights one such attack on Fortinet FortiGate firewall users. Finally, we round off a reputed university shutting off classes, fearing a cyber-attack on its network.
You might have heard that email authentication protocols are only for businesses, but that’s not entirely true!
Don’t you think email security is crucial for everyone, including businesses that send email campaigns and email service providers (ESPs) that facilitate them? If so, you can agree with us when we say that email authentication is a must for every entity in the email ecosystem, including the ESPs.
Enforcement rules for DMARC for optimum protection against phishing and spoofing
by DuoCircle
Just like SPF offers domain owners the choice between Softfail and Hardfail, DMARC has three enforcement rules: none, quarantine, and reject. Each has its own significance and relevance in the DMARC compliance journey.
![Zip Flaw Exploited, Meta Confirms Spyware, ENGlobal Ransomware Outage – Cybersecurity News [February 03, 2025]](https://www.duocircle.com/wp-content/uploads/2025/02/spf-permerror-6464.jpg)
![DeepSeek AI Cyberattacks, Health Provider Breached, Telecom Data Impact – Cybersecurity News [January 27, 2025]](https://www.duocircle.com/wp-content/uploads/2025/02/spf-record-tester-5454.jpg)
![Cyberattacks Targeting Institutions, Treasury Security Alarms, Telecom Network Breach – Cybersecurity News [January 20, 2025]](https://www.duocircle.com/wp-content/uploads/2025/01/dkim-selector-2.jpg)
![New PhishWP Threat, Illicit Marketplace Live, Codefinger Targets AWS – Cybersecurity News [January 13, 2025]](https://www.duocircle.com/wp-content/uploads/2025/01/dmarc-report-3.jpg)
