Google Workspace helps businesses send emails every day, but keeping those emails safe is just as important as sending them. Gmail now strongly encourages domains to use DMARC, which tells mail servers how to treat suspicious messages. If you set it up correctly, your emails are more likely to reach inboxes and your brand stays protected.
Selecting a reliable partner for your email migration is a mission-critical decision for both individuals and organizations, whether you are overseeing a personal email migration, business email migration, or a large-scale enterprise email migration.
DomainKeys Identified Mail (DKIM) is a sophisticated email authentication protocol used to help combat email spoofing and to ensure message integrity between the email sender and the email recipient. At its core, DKIM works by adding a unique cryptographic digital signature—known as the DKIM signature—to every outgoing email. This DKIM signature is generated using a private DKIM key, which is securely stored by the email server or email sending platform.
DMARC (Domain-based Message Authentication, Reporting, and Conformance) is a crucial email security protocol that prevents email spoofing, phishing attacks, and business email compromise by ensuring that only authorized sources can send email on behalf of a domain. By leveraging SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail), DMARC builds on these foundational email authentication methods to provide domain owners with granular control and visibility over their email traffic.
SPF is the foundation of your email authentication, as it tells the receiving servers, “these are the only servers and addresses allowed to send emails on our behalf.” So, when an email goes out from your side to a provider like Gmail or Microsoft Outlook, their servers pull out your SPF record to confirm if the email came from a server you actually approved. If the server matches one of the entries in the list, the email is delivered.
![ToddyCat APT Evolving, Harvard Breach Reported, SitusAMC Vendor Breach– Cybersecurity News [November 24, 2025]](https://www.duocircle.com/wp-content/uploads/2025/12/spf-validator-5634.jpg)
You might have been sending emails using Gmail for years now, but that’s not a good enough reason for the Email Service Provider (ESP) to let your email in, even if it feels like something’s off. Since email-based attacks are becoming so frequent and rampant, your sender reputation and good faith no longer suffice, given today’s threat landscape. That is why Gmail and other ESPs verify every email they receive before delivering it to the recipient’s inbox.
Email authentication protocols like SPF, DKIM, and DMARC are supposed to stop attackers from pretending to be you and dupe your clients. But what if they target the very system that these protocols depend on?
![Logitech Data Breach, Mass Router Hijack, Android Trojan Sturnus – Cybersecurity News [November 17, 2025]](https://www.duocircle.com/wp-content/uploads/2025/11/hosted-email-server-4002.jpg)
Here are this week’s cybersecurity updates, bringing you headlines that made news around the world. Princeton University reported a data breach impacting alumni and donors, and the Clop extortion gang’s activity continued, with Logitech confirming data theft linked to a third-party zero-day.
DuoCircle, LLC (“Company”) hereby provides formal notice that all data associated with the discontinued MailHostingService.com email hosting platform has been permanently and irreversibly destroyed in accordance with applicable data protection regulations and industry best practices.