AutoSPF Blog

Intermediate

A Complete Guide To SPF Record Types: 6 Variations Explained Simply
ByBrad Slavin November 21, 2025November 21, 2025 Reading Time: 14 minutes

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…

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Foundational

10 Reasons The SPF Standard Is Essential For Protecting Your Domain
ByBrad Slavin November 20, 2025November 20, 2025 Reading Time: 15 minutes

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…

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Intermediate

The 12.4 billion shield for your email communications: Why DMARC software is the unsung hero in the war against phishing actors!
ByBrad Slavin November 19, 2025December 2, 2025 Reading Time: 4 minutes

Email communications are an integral part of the modern business ecosystem. However, the excessive reliance on emails has made it one of the biggest vulnerabilities, too. We are living in a time where a single phishing attack can ruin the reputation and finances of an entire business. That’s exactly why simple filtering methods are inadequate…

Read More The 12.4 billion shield for your email communications: Why DMARC software is the unsung hero in the war against phishing actors!
Foundational

Why Every Domain Owner Should Maintain A Valid SPF Record
ByBrad Slavin November 18, 2025November 18, 2025 Reading Time: 14 minutes

An SPF record (Sender Policy Framework) is a crucial piece of your domain’s DNS settings that defines which mail servers are authorized to send email on behalf of your domain. Every domain owner should understand that an SPF record is more than a simple DNS entry—it’s a cornerstone of effective email authentication and is essential…

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Intermediate

How the SPF Record Character Limit Affects Your Email Authentication
ByBrad Slavin November 14, 2025November 14, 2025 Reading Time: 15 minutes

Sender Policy Framework (SPF) is a cornerstone email authentication protocol designed to combat email spoofing and enhance email security. The SPF record is a type of DNS record—specifically a TXT record—that defines which mail servers are authorized to send emails on behalf of a domain. This DNS TXT record contains SPF syntax that specifies the…

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Advanced

Top Ways To Resolve Too Many SPF Lookups Without Breaking Authentication
ByBrad Slavin November 13, 2025November 13, 2025 Reading Time: 13 minutes

The Sender Policy Framework (SPF) is a critical email authentication technology designed to detect and prevent email spoofing—an often exploited mechanism by malicious actors to impersonate legitimate senders like victim.com or corporate ESPs such as Microsoft Office 365 or Gmail. By publishing a carefully constructed SPF record in the Domain Name System (DNS), domain owners…

Read More Top Ways To Resolve Too Many SPF Lookups Without Breaking Authentication
Intermediate

The after-effects of SPF misalignments that you should know about
ByBrad Slavin November 12, 2025November 12, 2025 Reading Time: 6 minutes

Implementing SPF is basically listing all the addresses and sources that send email on your behalf. But that’s only a surface-level understanding of the protocol. In reality, SPF works on a much deeper level. It lets the receiving server check if the incoming email is really coming from where it claims to. We say this…

Read More The after-effects of SPF misalignments that you should know about
Foundational

Why You Should Setup SPF Record to Protect Your Domain Reputation
ByBrad Slavin November 10, 2025November 10, 2025 Reading Time: 12 minutes

An SPF record, or Sender Policy Framework record, is a critical DNS record designed to prevent email spoofing and improve email authentication. Technically, an SPF record is a type of DNS TXT record published on the Domain Name System (DNS) for a specific domain. This DNS record specifies which mail sources—including IP addresses in IPv4…

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Intermediate

Can SPF stop DNS spoofing? Here is what you need to know
ByBrad Slavin November 7, 2025November 7, 2025 Reading Time: 6 minutes

Imagine typing a familiar website address into your browser, only to end up on a malicious page that looks exactly like the original. This scenario results from DNS spoofing, a deceptive technique that manipulates the Domain Name System to misdirect users or intercept communications. It is one of the many ways attackers exploit weaknesses in…

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Intermediate

SPF Sendgrid Configuration Guide: Ensure Your Emails Pass Authentication
ByBrad Slavin November 7, 2025November 7, 2025 Reading Time: 13 minutes

Sender Policy Framework (SPF) is a critical email authentication protocol designed to prevent unauthorized users from sending emails on behalf of your domain. By creating and publishing SPF records in your domain’s DNS settings, you authorize specific mail servers to send email for your domain, safeguarding your digital footprint from email spoofing, phishing, and spam…

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