When your outgoing email does not return a normal pass or fail SPF, you might think that the message was simply not authenticated. But it can be a little more complex than that. Sometimes, the receiving server just cannot evaluate the SPF record at all, and you might come across errors like SPF PermError and…
The most common SPF checker finding that indicates misconfigured include statements is that the included domain publishes no SPF record (e.g., include:vendor.example points to a domain with no valid SPF/TXT) — typically surfaced as “PermError: included domain has no SPF record” or a warning that the include evaluates to “none/neutral,” depending on the validator. SPF…
HIPAA compliance means protecting sensitive patient data, also called protected health information or PHI. This includes names, medical records, insurance details, and any information that could identify a patient. Any organization that handles this data must keep it private and secure. Email becomes a problem because it was not designed for sensitive communication. Messages can…
An SPF record tester matters because it verifies your DNS-published sender authorizations end-to-end, catches syntax and lookup-limit failures before mailbox providers do, models provider-specific interpretations, and directly improves deliverability by ensuring authenticated, aligned email reaches the inbox. In simple terms, Sender Policy Framework (SPF) tells receiving mail servers which IPs and hosts are allowed to…
Email ecosystems these days are no longer limited to only a couple of email servers. Most organizations now rely on external tools and services, such as email platforms, marketing tools, security gateways, and authentication solutions, to manage and protect their email communications. The problem with such a complex ecosystem is integrating all these platforms with…
An SPF validator reports lookup-limit or mechanism-count issues when evaluating a sender’s SPF policy would require more than 10 DNS-querying terms—specifically include, a, mx, ptr, exists, and redirect per RFC 7208—or when nested includes, provider chains, void lookups, or DNS behaviors (like CNAME indirections and timeouts) cause the cumulative count to exceed the cap, which…
Back in 2017, when the web wasn’t as structured as it is today from a security standpoint, many organizations didn’t have the right tools to analyze the security posture of their domains and websites. That’s when the UK government introduced Mail Check and Web Check as part of its Active Cyber Defence programme. These tools…
You can interpret SPF lookup results to find configuration errors by parsing the record’s mechanisms and qualifiers in order, comparing them to the connecting IP and envelope domain, mapping the resulting status (pass, fail, softfail, neutral, permerror, temperror) to likely delivery behavior, and then tracing the DNS resolution path (includes, redirects, lookups) for syntax mistakes,…
To avoid email spoofing with Sender Policy Framework (SPF) in Office 365, publish a correct SPF TXT record (typically v=spf1 include:spf.protection.outlook.com -all), add vetted third-party includes, enable DKIM and DMARC, continuously validate, and manage complexity and lookups with a purpose-built tool like AutoSPF. Office 365 (Microsoft 365) uses Exchange Online Protection (EOP) to authenticate inbound…
It’s 2026, and companies no longer use traditional on-premise email servers; they have now moved to cloud platforms like Microsoft 365 and Google Workspace. This means that the conventional ways of protecting emails at the network boundary also don’t work anymore. To ensure that their emails are secure despite this, organizations have now shifted to…
