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…

Flattening SPF records: Why is it worth the effort?

Flattening SPF records: Why is it worth the effort?

ByBrad Slavin Reading Time: 5 minutes

Maintaining an SPF record is pretty easy, given that you use only one or two email services. But that’s not always the case. For most organizations, there are more than a handful of servers and third-party services that are used to send emails to their clients and prospects. These services include CRM platforms, marketing tools,…

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…

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

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

ByBrad Slavin Reading Time: 15 minutes

To set up an SPF record for your domain using GoDaddy, log in to your Domain Portfolio, select the domain you wish to configure, navigate to the b, and add a new TXT record with the appropriate SPF value, which typically looks like “v=spf1 include:secureserver.net -all” for GoDaddy services. Be sure to save the changes…

SPF and multi-tenant email service providers: a collision course?

SPF and multi-tenant email service providers: a collision course?

ByBrad Slavin Reading Time: 5 minutes

During the 2024 Black Friday to Cyber Monday (BFCM) period, Mailchimp customers sent billions of emails. Notably, on Black Friday alone, over 133 million emails were dispatched in a single hour. On the other hand, SendGrid claims to send 148+ billion emails every month. And at the same time, there has been a massive 202%…

SPF DNS lookup limits: exploits, mitigations, and best practices

SPF DNS lookup limits: exploits, mitigations, and best practices

ByBrad Slavin Reading Time: 6 minutes

SPF (Sender Policy Framework), one of the three email authentication protocols, enables recipient email servers to verify whether or not the email received is an authorized one. However, SPF comes with its own set of intricacies, as there is a limit of 10 DNS lookups. Once the SPF record has reached the maximum limit of…

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…

Are no-reply emails safe? Understanding the security risks of these emails

Are no-reply emails safe? Understanding the security risks of these emails

ByBrad Slavin Reading Time: 8 minutes

If you regularly send out marketing emails for your business, you probably know what kind of emails we’re talking about— those automated messages sent from addresses like no-reply@yourcompany.com.  These kinds of emails are very popular among businesses and are often used to convey some kind of information, like order confirmations, shipping updates, newsletters, and system…

SPF Records for Email: Essential Authentication Setup for Your Domain

ByBrad Slavin Reading Time: 14 minutes

SPF records, or Sender Policy Framework records, are essential components of email authentication that allow domain owners to specify which IP addresses are authorized to send emails on their behalf. They play a critical role in enhancing email deliverability and security by helping to prevent spoofing and ensuring that legitimate emails reach their intended recipients….