People tend to think of setting up email authentication with DMARC, DKIM, and SPF as time-consuming and error-prone because they have to search the Web for various articles and tools to achieve a simple DMARC, DKIM and SPF setup. This can take days for those who aren't proficient in email authentica…

Can you have multiple SPF records on a single domain? The answer is no: a domain MUST NOT have multiple SPF records, otherwise SPF fails with PermError.

An SPF record is a TXT record in the DNS starting exactly with "v=spf1", followed by an array of mechanisms and/or modifiers…

The advent of DMARC (Domain-based Message Authentication Reporting and Conformance) enables businesses to thwart email spoofing attacks and improve email deliverability. Not only can a DMARC implementation with a p=reject policy block all unauthorized emails via a domain, but also it delivers 100% l…

What is DMARC?

DMARC, which stands for “Domain-based Message Authentication, Reporting & Conformance”, is a way to determine whether an email message is actually from the sender or not. It builds on the widely deployed SPF and DKIM protocols, and adds domain alignment checking and reporting capabi…

We are pleased to release 3 diagnostic tools for email authentication. These are: SPF checker, DKIM checker and DMARC checker. Each of these tools can check a certain aspect of your email domain, and together they give you an overview of the health status of your email program…