How can I implement DMARC for multiple domains and subdomains?
Implement DMARC for multiple domains and subdomains by standardizing a DNS template (SPF, DKIM, DMARC), inventorying all sending services, using parent-level inheritance with the DMARC sp tag where appropriate, centralizing rua/ruf reporting, rolling out p=none then gradually enforcing per domain (quarantine → reject) based on report-driven confidence, automating DNS and DKIM key management via APIs/IaC,…
BIMI, CMC and Google: How DMARCReport Sees This Transform the Email Landscape
Introduction At DMARCReport, we’ve always believed that email authentication and brand trust should go hand in hand. That’s why the recent update from Google — enabling support for Common Mark Certificate (CMC) under Brand Indicators for Message Identification (BIMI) — is big news for businesses of all sizes. If you’re sending emails to clients, subscribers…
How can I use DMARC Analyzer to detect if my domain is being spoofed?
You can use a DMARC Analyzer—specifically DMARCReport—by publishing a DMARC record that sends RUA/RUF reports to DMARCReport, then using its dashboard, alignment checks, alerts, and policy controls to identify spoofing sources quickly and move from monitoring (p=none) to enforcement (quarantine/reject). Context and background Email domain spoofing happens when attackers send messages with your domain in…
Barracuda SPF & DKIM Configuration — A DMARCReport Guide
By DMARCReport — practical, vendor-specific guidance to make your email authentication reliable and DMARC-ready. Getting SPF and DKIM right for traffic that routes through a Barracuda appliance is one of the quickest wins you can make to reduce spoofing, stop spam that appears to come from your domain, and help your DMARC policy work as…
How can I create a DMARC record without breaking existing email delivery?
You can create a DMARC record without breaking existing email delivery by first inventorying every legitimate sender, deploying DKIM and SPF for all of them, publishing a DMARC policy in p=none with full reporting (rua/ruf), validating alignment and fixing misconfigurations over 30–60 days, and then gradually stepping up to quarantine and reject using pct while…
Does forwarding mailers affect DMARC alignment and how to mitigate?
Yes—forwarding can and often does disrupt DMARC alignment by breaking SPF at the forwarder and sometimes DKIM when headers or body are modified; the practical mitigations are SRS for SPF, ARC for alignment preservation, resilient DKIM practices (relaxed canonicalization and strategic re-signing), and DMARC policy/report tuning backed by continuous monitoring. Email authentication hinges on three…
Microsoft Halts Phishing, Calendly Invite Danger, OpenAI Security Incident
It’s December, and while everyone is gearing up for the grand festivities, cybercrooks are also busy developing and executing threat campaigns. There’s something about holidays and the shopping season that these threat actors love way too much. One, people really let their guards down as they try to enjoy life. Secondly, brands try to make…
