An “invalid DKIM signature” result means the message contains a DKIM-Signature header but the verifier cannot validate it—typically because the computed header/body hashes don’t match what was signed or because the public‑key lookup/cryptographic verification fails—so the signature is untrusted. DKIM (DomainKeys Identified Mail) asserts message integrity and domain authentication by hashing specific headers and the…
DKIM keys are important for email deliverability and anti-spoofing because they let receivers cryptographically verify that the visible From-domain authorized the message and that headers/body were not altered, enabling DMARC alignment that boosts inbox placement while blocking spoofing—even across forwarding and mailing lists. Context and background DomainKeys Identified Mail (DKIM) is a signature framework defined…
Start reviewing DMARC aggregate (RUA) reports within 24–48 hours of publishing your DMARC record—immediately upon receipt of the first reports—and continue daily reviews for at least 14–30 days (30–60 days for large enterprises) before moving from p=none to quarantine/reject, using DMARCReport automation to catch early issues and validate readiness. Context: What DMARC Aggregate Reports Are…
Here’s the bulletin for week 2 in February. Last week focused on cyberattacks targeting critical infrastructure, including the European Commission and Singapore’s telecommunications sector. Meanwhile, multiple crypto users have fallen prey to address poison scams. Also, the Senegal threat attack managed to disrupt crucial government services, leading to panic and confusion. European Commission’s mobile device…
You should implement DKIM immediately—even if SPF and DMARC are already configured—because DMARC enforcement and reliable deliverability depend on a DKIM-aligned signature that survives forwarding and third-party relays. SPF authenticates the connecting IP but commonly breaks on forwarding; DMARC only passes if either SPF or DKIM aligns with the visible From domain, so leaving out…
In today’s digitally connected landscape, Distributed Denial of Service (DDoS) attacks represent one of the most disruptive and persistent threats to online infrastructure. Whether the target is a global e-commerce platform, a government portal, a small business website, or a cloud-based application, DDoS attacks aim to drain resources, block legitimate traffic, and render services unavailable…
Email is one of the most transformative technologies in the history of digital communication. Although it may seem like a mundane tool you use every day to send messages, share files, or coordinate with teams, email’s evolution is a remarkable journey that spans decades of innovation, expansion, and adaptation. Today, more than 300 billion emails…
DKIM verification protects email by cryptographically validating that selected headers and the body were unaltered and bound to the domain in the d= tag, while SPF only checks whether the sending IP is authorized for the envelope domain and DMARC enforces policy by requiring domain alignment of a passing DKIM or SPF result with the…
The DKIM selector (s=) is the label that tells verifiers which specific public key to fetch at selector._domainkey.d=domain, while the DKIM domain (d=) names the signing domain that owns the key in DNS and is the value used for DMARC alignment—verification always looks up s= under d=, but only d= participates in alignment. Context and…
The DNS providers that make it easiest to add a DMARC record are Cloudflare and DNSimple for overall usability, cPanel/Plesk-based hosts for true guided “wizards,” and AWS Route 53 for programmatic workflows—while Google Cloud DNS, Azure DNS, NS1 Connect, DigitalOcean, GoDaddy, Namecheap, Gandi, Porkbun, and Hetzner also work well but typically require more manual steps….
The first edition of February revolves mainly around phishing attacks. While a new type of phishing campaign is doing the rounds that involves targeting PDFs and Dropbox, notorious cyber gang ShinyHunters seemed to have bypassed MFA in their latest cyberattack. Meanwhile, multiple journalists are being targeted by misusing the Signal messenger. An Indian firm fell…
Email marketing continues to be one of the most effective digital communication channels for businesses worldwide. Platforms such as Mailchimp simplify campaign creation and audience engagement, but successful email delivery depends heavily on proper authentication. Without it, even legitimate emails risk being flagged as spam or rejected entirely. At DMARCReport, we work closely with organizations…
If you run an e-commerce business, email is not just a marketing channel. It is your order confirmation system, your password reset mechanism, your customer support line, and often your main revenue driver. Platforms such as WooCommerce, Shopify, Magento, BigCommerce, and PrestaShop rely heavily on transactional and marketing emails to operate smoothly. Now imagine those…
DMARC aggregate reports most commonly reveal SPF and DKIM authentication and alignment failures, unauthorized/forged senders, misconfigured internal or third‑party systems, and configuration pitfalls (SPF include limits, missing/rotated DKIM selectors, forwarding/mailing list artifacts, subdomain policy mismatches), and you should prioritize remediation in this order: 1) high‑volume spoofing that fails both SPF and DKIM, 2) legitimate business‑critical…
In today’s digital world, protecting your domain from spoofing, phishing, and misuse isn’t just a best practice — it’s essential. As email continues to be one of the primary channels for business communication, ensuring that your domain adheres to robust email authentication standards is crucial to maintaining deliverability, protecting brand reputation, and safeguarding your customers….
Common signs your domain has no DMARC record published include DNS queries for _dmarc.yourdomain returning NXDOMAIN or “no TXT answer,” missing or “DMARC not evaluated” entries in Authentication-Results headers, zero DMARC aggregate/forensic reports in your monitoring, no DMARC-related enforcement bounces or provider warnings, and consistent checks across all authoritative name servers and subdomains showing no…
