Email Rejected Per SPF Policy: Troubleshooting Sender Authentication Issues

Email Rejected Per SPF Policy: Troubleshooting Sender Authentication Issues

ByBrad Slavin Reading Time: 11 minutes

Email communication is a critical lifeline for businesses and individuals alike, but what happens when that essential connection breaks down? You might find yourself baffled as your carefully crafted messages get returned with an “email rejected per SPF policy” error. This common issue can create roadblocks in your correspondence and leave you feeling frustrated, especially…

Zix SPF Record: A Complete Guide to Configuration and Setup

Zix SPF Record: A Complete Guide to Configuration and Setup

ByBrad Slavin Reading Time: 13 minutes

Setting up an SPF record can feel like navigating a maze, especially for those not deeply familiar with the world of email security. Imagine sending out an email that looks perfectly legit, only for it to land in someone’s spam folder because your domain’s protection wasn’t set up right—that’s frustrating! But don’t worry; this guide…

Efficient DMARC tools are needed after the UK NCSC changes

Efficient DMARC tools are needed after the UK NCSC changes

ByBrad Slavin Reading Time: 5 minutes

Starting 24 March 2025, the National Cyber Security Center in the UK has put an end to DMARC aggregate reporting— a feature that helped domain owners and administrators evaluate the efficacy and correctness of SPF, DKIM, and DMARC configurations. This significant change reflects a critical bracket for public sector organizations operating in the UK, especially…

SPF Records in DNS: A Complete Guide for Email Security

SPF Records in DNS: A Complete Guide for Email Security

ByBrad Slavin Reading Time: 16 minutes

SPF (Sender Policy Framework) records in DNS are TXT records that specify which mail servers are authorized to send emails on behalf of a domain, helping to prevent email spoofing. Implementing SPF records is crucial for improving email deliverability and protecting your domain’s reputation by reducing the chances of your emails being marked as spam…

Brevo SPF Record: A Complete Guide to Optimize Email Deliverability

ByBrad Slavin Reading Time: 15 minutes

A Brevo SPF (Sender Policy Framework) record is essential for ensuring that emails sent from your domain are properly authenticated, improving deliverability, and preventing them from being marked as spam. Maintaining an effective SPF record not only helps in reaching intended inboxes but also protects your domain’s reputation by preventing unauthorized use for sending fraudulent…

Multiple SPF records open avenues for phishing

Multiple SPF records open avenues for phishing

ByBrad Slavin Reading Time: 5 minutes

If your SPF is not working efficiently, chances are that your domain is linked with multiple SPF records. The problem with numerous SPF records is that they are inconsistent, which leads to unpredictable email authentication behavior. This misconfiguration breaks email authentication, triggering receiving mailboxes to reject the SPF check.  Having multiple SPF records isn’t just…

How does SPF flattening simplify DNS records?

ByBrad Slavin Reading Time: 3 minutes

Each SPF record should not have more than 10 DNS lookups; otherwise, validation failures are triggered. SPF records of organizations with an intricate email infrastructure are more likely to hit this limit and experience permanent errors. This is where the process of SPF flattening steps in to keep the records within the limit of 10…

Why is IoT email authentication a hot topic? 

ByBrad Slavin Reading Time: 6 minutes

These days, IoT (Internet of Things) devices are everywhere. These are basically smart gadgets that are connected to the internet and communicate with each other. Some of the common ones around you are Amazon Echo (Alexa), smartwatches, industrial sensors, smart air conditioners, etc. While there is no doubt that these devices are making our lives…

Bluehost SPF Record: A Step-by-Step Setup Guide for Email Configuration

ByBrad Slavin Reading Time: 10 minutes

Setting Up Your Bluehost SPF Record Configuring an SPF record is like putting a lock on your front door; it helps keep unwanted visitors (or spam) out of your domain’s email communications. To start, you’ll need to log into your Bluehost account. Open your web browser, go to the Bluehost login page, and enter your…

Broken SPF record- What does it mean and how to fix it!

Broken SPF record- What does it mean and how to fix it!

ByBrad Slavin Reading Time: 6 minutes

Sender Policy Framework, or SPF, is one of the policies that keeps your email communications safe from malicious attempts of threat actors. But what happens if it gets broken? It can have serious implications, such as exposing your email systems to phishing and spoofing attacks. The email deliverability rate can also come down significantly. So,…