Intermediate 6 min
Optimizing Email Deliverability: Strategies for Success
Your carefully crafted marketing campaign just launched, complete with compelling subject lines and perfectly timed send schedules.
Knowledge Base
Blog
Expert guides on SPF, DKIM, DMARC, and email security.
Intermediate 5 min
Understanding the relevance of Sender Policy Framework (SPF) in 2025
Sender Policy Framework (SPF) is an email authentication protocol designed to prevent email spoofing - a common tactic in spam and phishing attacks.
Intermediate 15 min
Kitterman SPF Check: A Comprehensive Guide to Performance Analysis
In the digital landscape, email is still one of the primary ways we communicate, whether for business proposals or casual chats.
Intermediate 15 min
KnowBe4 SPF Record: How to Set Up for Maximum Email Security
In an age where email remains a primary communication tool for businesses, the dangers lurking in our inboxes are more real than ever.
Intermediate 5 min
BEC and FTF scams are leading to a steep rise in cyber insurance claims!
As per the recent Coalition 2025 Cyber Claims Report, business email compromise-based attacks (BEC) and fund transfer frauds (FTF) have led to a steep surge in.
Foundational 7 min
What is an executive phishing attack and how to prevent it?
Threat actors try different tactics to intercept and steal data, which is further exploited for financial gain. One such tactic is an executive phishing attack.
Advanced 5 min
The healthcare industry is the most sought-after by cybercriminals
The healthcare industry depends a lot on technology - whether it’s online appointments, digital health records, or connected medical devices.
Intermediate 5 min
Fixing typical SPF errors
SPF prevents spoofing by ensuring that only trusted sources can send emails using your domain. But for it to work well, the SPF record must be error-free.
Intermediate 16 min
WPEngine SPF Record: Complete Guide to Proper Email Setup
Email may seem like a simple tool for communication, but behind the scenes, it’s a battleground for security and credibility.
Foundational 13 min
Mailchimp SPF Record Setup: Ensure Your Email Deliverability
Setting up your email system can often feel like tackling a giant puzzle - each piece needs to fit just right for everything to work smoothly.
Intermediate 13 min
Wix SPF Record: A Complete Guide to Configure DNS Settings
Email security can often feel like a daunting task, especially when you hear about phishing scams and spoofing.
Intermediate 4 min
What are dangling SPF records and why are they a threat to email security?
SPF records are highly sensitive - even a minor change can invalidate them or trigger an error, resulting in improper email authentication.
Intermediate 13 min
Email Rejected Per SPF Policy: Troubleshooting Sender Authentication Issues
Email communication is a critical lifeline for businesses and individuals alike, but what happens when that essential connection breaks down?
Intermediate 15 min
Zix SPF Record: A Complete Guide to Configuration and Setup
To authenticate email sent through Zix (now part of OpenText Cybersecurity), add the Zix-provided include mechanism to your SPF record. The exact include string varies by product tier (ZixEncrypt, ZixProtect, ZixMail). Learn the exact syntax and how to combine with existing senders.
Advanced 5 min
SPF and multi-tenant email service providers: a collision course?
During the 2024 Black Friday to Cyber Monday (BFCM) period, Mailchimp customers sent billions of emails.
Intermediate 5 min
Efficient DMARC tools are needed after the UK NCSC changes
DMARC (RFC 7489) ties SPF and DKIM together by requiring alignment between the envelope sender and the visible From header.
Intermediate 18 min
SPF Records in DNS: A Complete Guide for Email Security
An SPF record is a DNS TXT record at the domain apex that declares which IP addresses and servers are authorized to send email for that domain. Learn how SPF records are published, how receiving servers evaluate them during SMTP, and how to avoid the most common DNS-level configuration mistakes.
Foundational 8 min
Are no-reply emails safe? Understanding the security risks of these emails
If you regularly send out marketing emails for your business, you probably know what kind of emails we’re talking about.
Foundational 17 min
SPF Records for Email: Essential Authentication Setup for Your Domain
SPF records, or Sender Policy Framework records, are essential components of email authentication that allow domain owners to specify which IP addresses are.
Intermediate 17 min
Brevo SPF Record: A Complete Guide to Optimize Email Deliverability
A Brevo SPF (Sender Policy Framework) record is essential for ensuring that emails sent from your domain are properly authenticated, improving deliverability.
Advanced 6 min
Shadow admins: How do you uncover the mask of these stealthy accounts?
Most organizations have strict norms and regulations on what resources their employees can access - like which systems are open to all.
Advanced 16 min
Understanding the Trello Breach: Security Concerns and Expert Response
The Trello breach, which occurred in January 2024, resulted in approximately 15 million users having their email addresses, names, usernames.
Intermediate 5 min
Multiple SPF records open avenues for phishing
If your SPF is not working efficiently, chances are that your domain is linked with multiple SPF records.
Foundational 17 min
What Is SPF Alignment? Understanding Email Security Protocols
SPF alignment is a DMARC concept: for DMARC to pass via SPF, the domain in the Return-Path (envelope sender) must match the domain in the From header. Relaxed alignment (default) allows subdomain matches; strict alignment requires an exact match. SPF can pass while DMARC still fails alignment.
Foundational 17 min
Microsoft Security Alert Email: How to Recognize Phishing and Scams
If you receive a Microsoft security alert email, first verify its authenticity by checking that it comes from ‘account-security-noreply@accountprotection.
Intermediate 6 min
Why is IoT email authentication a hot topic?
Why is IoT email authentication a hot topic? explains SPF record management, sender authentication, troubleshooting steps, and how AutoSPF helps maintain.
Intermediate 4 min
Managing relaying in application emails
Over the past few years, there has been a significant evolvement in email relay controls, especially in how application-generated emails are handled.
Advanced 3 min
Gmail, Outlook, and Apple Mail warn users ahead of anticipated AI menaces in 2025
Gone are the days when incorrect grammar, poor graphics, an unprofessional tone, and other flaws were red flags of a phishing email.
Intermediate 16 min
Kitterman SPF Check: A Comprehensive Guide to Accurate Analysis
Email is a major part of our daily communication, yet many people overlook the importance of securing it.
Intermediate 5 min
Do even ESPs get SPF wrong? Here’s what you should know
Email security is a two-way street, which means both the client and the email service provider are responsible for maintaining the legitimacy and authenticity.
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