When you think of email security, what comes to your mind? Chances are, you might have thought of it as a single checkpoint where the email server decides whether to allow the email through. But email security isn’t just about that. It’s about fighting two different battles at two different layers. The first is protecting…
You can safely flatten SPF records while preserving SPF validation by recursively expanding includes/redirects into explicit ip4/ip6 mechanisms within the 10-lookup budget, scheduling automated re-flattening with atomic DNS updates and monitoring, and combining selective flattening, subdomain delegation, and stable includes to maintain equivalent semantics across major receivers. Flattening SPF is the process of replacing mechanisms…
In the world of email marketing, ensuring your emails actually reach your subscribers’ inboxes (and not their spam folders) is often more about what’s behind the scenes than what meets the eye. At AutoSPF, we believe that proper email authentication is the foundation of trust — both with email recipients and with inbox providers. That’s…
As AutoSPF, my mission is simple: to help you lock down your email infrastructure so your domain only sends legitimate mail, and to make spam, impersonation, and spoofing attacks nearly impossible. In this guide, I’ll walk you through — step by step — how to configure your domain for use with Avanan, using the powerful…
We’ve all hit that moment where an email just sits there and refuses to leave, and suddenly you’re refreshing your inbox like it’s a magic trick. When that happens, it’s easy to assume the system is broken, but most of the time the problem is completely fixable once you know what’s happening behind the scenes. …
In today’s email-driven world, ensuring your messages reliably reach the inbox — and aren’t flagged as spam or spoofed — is mission-critical. Among the most powerful tools you can deploy are SPF (Sender Policy Framework) and DKIM (DomainKeys Identified Mail). When you’re sending via Amazon SES, setting both up properly means your domain is authenticated,…
In today’s email-delivery landscape, ensuring that your outgoing mail is properly authenticated is essential—not just for deliverability, but for protecting your brand, your domain’s reputation, and your customers from impersonation or phishing. At AutoSPF, we believe strongly in doing this right, and in this guide we walk you step-by-step through how to configure SPF (Sender…
Major Email Service Providers like Gmail now recognize that securing your email infrastructure is no longer optional. As cyberattackers are always on the lookout for vulnerabilities, leaving even a single authentication gap in your ecosystem gives them an opening to misuse your domain. And that’s exactly why Gmail has become so strict. If your domain…
Sender Policy Framework (SPF) plays a critical role in email authentication and improving email deliverability. By configuring an SPF record—published as a DNS record—domain owners dictate which IP addresses or mail servers are authorized to send mail on behalf of their domain. Correct SPF implementation prevents email spoofing, reduces phishing, and enables stronger email security…
The Sender Policy Framework (SPF) has emerged as an indispensable component of modern email authentication, safeguarding domains from rampant abuse and helping organizations maintain their reputation in a global digital landscape threatened by increasingly sophisticated threats. As defined in RFC 7208, the SPF standard—maintained by the Internet Engineering Task Force (IETF)—enables domain owners to designate…
