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…
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…
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…
When managing a domain, one of the choices you’ll face is how to configure your DNS (Domain Name System) records. Two of the most important and commonly confused record types are A records and Alias records. Though they may seem similar, they behave differently — and choosing the right one can make a big difference…
DMARC, or Domain-based Message Authentication, Reporting, and Conformance, is one of the most crucial security protocols in your email authentication setup. As it builds on SPF and DKIM, it checks whether an email is genuinely aligned with the domain it claims to come from and, if not, how it should be handled. This sounds simple,…
The best tools for bulk DMARC lookup across hundreds of domains are a mix of commercial SaaS platforms (e.g., DMARC Report, dmarcian, EasyDMARC, PowerDMARC, Valimail Monitor, MXToolbox, WhoisXML API) and high-performance open-source utilities (e.g., massdns, ZDNS, ProjectDiscovery dnsx) combined with scripting libraries (Python dnspython, Go miekg/dns) for automation and validation at scale. Bulk DMARC lookup…
As cyber threats escalate in frequency and sophistication, companies can no longer treat security as an afterthought. A robust cybersecurity posture demands proactive measures, and one of the most powerful among them is penetration testing. In this article, DMARCReport walks you through how penetration testing can significantly bolster your defenses — as well as the…
Compared to MXToolbox, Valimail, and DMARCian, DMARC Analyzer provides stronger guided onboarding and automated validation than MXToolbox and DMARCian but less end-to-end automation than Valimail; in practice, organizations tend to reach p=reject fastest with Valimail or DMARC Report, steadily with DMARC Analyzer, slower with DMARCian, and slowest with MXToolbox. DMARC setup is notoriously cross-functional—touching DNS,…
