What is the recommended DNS record syntax for a DMARC record used with Office 365?

What is the recommended DNS record syntax for a DMARC record used with Office 365?

ByBrad Slavin

Publish a TXT record at _dmarc.yourdomain.com with the value “v=DMARC1; p=none; rua=mailto:rua@dmarcreport.com; ruf=mailto:ruf@dmarcreport.com; fo=1; pct=100; adkim=r; aspf=r; sp=none” to begin DMARC monitoring for Office 365 safely and effectively. DMARC (Domain-based Message Authentication, Reporting and Conformance) builds on SPF and DKIM to tell receivers how to handle messages that fail authentication. In an Office 365 tenant,…

Monitor, Analyze, And Protect: A Free DMARC Analyzer Solution

Monitor, Analyze, And Protect: A Free DMARC Analyzer Solution

ByBrad Slavin

You can monitor, analyze, and protect your domain for free by implementing SPF, DKIM, and an initial p=none DMARC record with RUA/RUF pointing to DMARCReport, then using DMARCReport’s free analyzer to visualize alignment, tune policies toward quarantine/reject, handle third‑party senders, and integrate alerts and privacy controls at scale. Modern email authentication hinges on three open…

Email-Borne Insurance Scams: A Complete Guide to Understanding, Preventing & Securing Your Domain

Email-Borne Insurance Scams: A Complete Guide to Understanding, Preventing & Securing Your Domain

ByBrad Slavin

In today’s highly digital world, email remains one of the most essential communication channels for businesses — especially in the insurance industry. Unfortunately, as the industry embraces digital transformation, it also becomes an increasingly attractive target for cybercriminals leveraging email to defraud companies and unsuspecting policyholders alike. Email-borne insurance scams aren’t just an annoyance. When…

How can I set up DMARC for my Google Workspace domain without breaking delivery?

How can I set up DMARC for my Google Workspace domain without breaking delivery?

ByBrad Slavin

To set up DMARC for your Google Workspace domain without breaking delivery, publish SPF (v=spf1 include:_spf.google.com ~all), generate and enable 2048‑bit DKIM in the Google Admin console, start with DMARC at p=none with rua/ruf to DMARCReport for monitoring, fix and align all third‑party senders via DKIM or aligned SPF, then progressively move to quarantine and…

DMARC: A Comprehensive Guide to Protect Your Domain — by DMARCReport

DMARC: A Comprehensive Guide to Protect Your Domain — by DMARCReport

ByBrad Slavin

Email security is among the most critical aspects of modern digital communications. Every year, organizations lose money, time, and reputation due to email fraud, phishing attacks, and domain spoofing. Studies show that even small breaches can cost businesses tens of thousands of dollars, while larger enterprises can lose millions per incident. With email-based threats rising…

How can I get started reading DMARC reports to understand delivery problems?

How can I get started reading DMARC reports to understand delivery problems?

ByBrad Slavin

Start by publishing a DMARC TXT record with aggregate (RUA) and optional forensic (RUF) destinations, ingesting those reports into a parser like DMARCReport, and then reading the aggregate XML fields—policy, alignment, SPF/DKIM results, source IP, and message counts—to correlate failures with your SPF/DKIM/DNS configuration and remediate misconfigurations before gradually tightening policy. DMARC is an authentication…

How long after publishing a DMARC DNS record should I expect to see effects on delivery?

How long after publishing a DMARC DNS record should I expect to see effects on delivery?

ByBrad Slavin

You should expect initial DMARC-driven delivery effects as soon as DNS caches refresh your new TXT record—typically within 5–60 minutes, broad enforcement by major mailbox providers within 1–24 hours, and full stabilization (including report-based visibility) within 24–72 hours. DMARC is evaluated in real time on each message, but its input—the DMARC TXT record at _dmarc.yourdomain—travels…

What Are The Best Tools For Validating And Analyzing A DMARC Record Example?

What Are The Best Tools For Validating And Analyzing A DMARC Record Example?

ByBrad Slavin

The best tools for validating and analyzing a DMARC record example are a combination of web validators (DMARCReport Validator, MXToolbox, dmarcian, DMARC Analyzer), command-line utilities (dig/host/nslookup, OpenDMARC), open-source parsers (parsedmarc), and APIs (DMARCReport API, SecurityTrails, WhoisXML) supplemented by deliverability testbeds (Gmail/Outlook header analysis, Mail-Tester, GlockApps) to cover both syntax accuracy and real-world enforcement outcomes. Why…

DMARC Deployment & Monitoring: A Practical Guide by DMARCReport

DMARC Deployment & Monitoring: A Practical Guide by DMARCReport

ByBrad Slavin

In today’s digital ecosystem, email remains one of the most vital communication channels for organizations worldwide. Yet, without strong safeguards in place, email domains can be abused by attackers to send phishing, spoofing, and other fraudulent messages that harm your brand, customers, and internal users. To protect your domain and ensure only authorized email senders…

Why is DMARC important for protecting emails sent from G Suite?

Why is DMARC important for protecting emails sent from G Suite?

ByBrad Slavin

DMARC is important for protecting emails sent from G Suite (Google Workspace) because it verifies your domain’s messages via SPF/DKIM alignment and tells receiving servers to quarantine or reject spoofed mail, which dramatically reduces phishing while improving deliverability and visibility through standardized reporting. G Suite’s native security (SPF and DKIM) prevents many spoofing attempts, but…

Why does Gmail reject or mark my messages as spam when my DMARC policy is strict?

Why does Gmail reject or mark my messages as spam when my DMARC policy is strict?

ByBrad Slavin

Gmail rejects or marks your messages as spam when your DMARC policy is strict because the messages fail DMARC alignment (SPF or DKIM pass but don’t align with the visible From domain), alignment is broken by forwarding/lists/intermediaries, or misconfigurations exist, and Gmail combines these results with reputation and engagement signals to quarantine or reject according…

How can I check whether my domain’s DMARC policy is correctly configured for Gmail?

How can I check whether my domain’s DMARC policy is correctly configured for Gmail?

ByBrad Slavin

To check whether your domain’s DMARC policy is correctly configured for Gmail, validate your DMARC DNS TXT record syntax and tags, confirm SPF and DKIM alignment with your header-from domain, send test messages to Gmail and inspect Authentication-Results and Google Postmaster Tools, verify delivery and parsing of DMARC aggregate (rua) reports (noting Gmail does not…

Business Email Compromise vs Phishing Attacks — A Deep Dive by DMARCReport

Business Email Compromise vs Phishing Attacks — A Deep Dive by DMARCReport

ByBrad Slavin

In today’s hyper-connected digital world, email remains the backbone of business communication — and unfortunately, also one of the most exploited attack vectors used by cybercriminals. Sophisticated threat actors continually refine their techniques to deceive trusted recipients, impersonate legitimate senders, and manipulate end users into disclosing sensitive information or transferring funds. At DMARCReport, we believe…

How can DMARC improve email deliverability and reduce phishing risks?

How can DMARC improve email deliverability and reduce phishing risks?

ByBrad Slavin

DMARC improves deliverability and reduces phishing by enforcing domain-aligned authentication (SPF/DKIM) that mailbox providers trust to place legitimate emails in the inbox while blocking or quarantining spoofed messages at scale. DMARC—Domain-based Message Authentication, Reporting, and Conformance—adds a policy and reporting layer on top of SPF and DKIM so receivers can verify that a message claiming…

Data Leak vs. Data Breach — A DMARCReport Perspective

Data Leak vs. Data Breach — A DMARCReport Perspective

ByBrad Slavin

In today’s digital world, terms like data leak and data breach are frequently used by news outlets, security blogs, and IT professionals—often interchangeably, but incorrectly. At DMARCReport, we believe that understanding the distinction between a data leak and a data breach is essential for building strong data-protection strategies. When combined with security measures like DMARC,…

Can DMARC Reports Help Me Detect Spoofing And Phishing Attempts?

Can DMARC Reports Help Me Detect Spoofing And Phishing Attempts?

ByBrad Slavin

Yes—DMARC aggregate (RUA) and forensic (RUF) reports can absolutely help you detect spoofing and phishing attempts by revealing who is sending as your domain, whether SPF/DKIM align, and where non-aligned traffic spikes point to active impersonation. DMARC sits on top of SPF and DKIM to answer a single question: did this message actually come from…