Advanced
Spam Whitelist Security Risks: How to Prevent Trusted Sender Spoofing
Learn about spam whitelist security risks, how attackers spoof trusted senders, and effective ways to protect your domain from phishing and email fraud.
Knowledge Base
Blog
Expert guides on SPF, DKIM, DMARC, and email security.
Advanced
SPF Is Everywhere. Strong Email Protection Is Not.
Explore SPF security gaps and configuration errors, and learn how SPF, DKIM, and DMARC strengthen email authentication and prevent spoofing.
Advanced
The dig Command Cheat Sheet: How to Query SPF Records Like a Security Pro
Learn how to use the dig command to query SPF records, troubleshoot DNS issues, check the 10-lookup limit, and strengthen email security.
Intermediate
How Should SPF Records Be Managed When Multiple Domains Share the Same Email Providers?
Learn how to manage SPF records across multiple domains sharing email providers, avoid DNS errors, and maintain secure, reliable email authentication.
Intermediate
Citrix Memory Exploit, Pentagon Database Breach, OpenSSL DTLS Flaw
Stay updated on major cybersecurity threats, including Citrix exploits, data breaches, OpenSSL flaws, malware, phishing attacks, and critical vulnerabilities.
Foundational
What Is QR Code Phishing in Email? How to Detect and Prevent Quishing
What Is QR Code Phishing? Learn how to detect and prevent quishing attacks, protect sensitive information, and stay safe from malicious QR codes in emails.
Advanced
Can a DMARC Inspector Detect SPF Failures and Misconfigurations?
A DMARC Inspector can detect SPF failures, DNS issues, alignment problems, and misconfigurations to improve email authentication and deliverability.
Advanced
How Can You Identify Which SPF Include Adds the Most DNS Lookups?
Learn how to identify which SPF include adds the most DNS lookups, optimize your SPF record, avoid the 10-lookup limit, and improve email deliverability.
Intermediate
One-Click Auto DNS Publishing with Entri: A Guide to SPF Record Setup
One-Click Auto DNS Publishing with Entri simplifies SPF record setup, helping you publish DNS records quickly, reduce errors, and improve email authentication.
Intermediate
What Is DTLS Protocol? How It Differs From TLS in Secure Communication
Discover what DTLS is, how it differs from TLS, and why it protects low-latency communication across WebRTC, VPNs, IoT, and gaming.
Foundational
Is This Email Legit? Learn How to Verify Email
Verify if an email is legitimate with practical steps to check sender details, links, authentication, and warning signs to avoid phishing and scams.
Intermediate
How Do DMARC Vendors Help Monitor Email Authentication?
DMARC vendors help organizations monitor email authentication, detect unauthorized senders, manage SPF and DKIM, and safely move toward DMARC enforcement.
Intermediate
Which SPF Filter Settings Prevent Spoofing Without Blocking Forwarded Mail?
Learn which SPF filter settings help prevent spoofing while reducing the risk of blocking legitimate forwarded emails and improving email deliverability.
Intermediate
Bitget Crypto Heist , ShinyHunters FBI Breach, Citrix Critical Patches
Bitget, FBIJobs.gov, Citrix, Microsoft, and other major cybersecurity incidents reveal evolving threats, breaches, vulnerabilities, and attacks.
Foundational
Office 365 Email Checker: A Complete Guide to Microsoft 365 Email Authentication
Office 365 Email Checker helps verify Microsoft 365 email authentication, detect risks, and improve email security, deliverability, and sender trust.
Foundational
Does SPF Work Like a Firewall? Understanding SPF Email Protection
Learn whether SPF works like a firewall and how SPF email protection helps authenticate senders, prevent spoofing, and improve email security.
Intermediate
What Is an Ice Phishing Attack? A Guide to Protecting Your Emails
Learn how ice phishing exploits wallet approvals, spot warning signs, and protect your email, crypto assets, and digital accounts.
Intermediate
5 Common DNS Vulnerabilities Affecting Email Authentication
Explore 5 common DNS vulnerabilities affecting SPF, DKIM, and DMARC, plus practical ways to strengthen email authentication and protect domains.
Foundational
What Is a AAAA Record and How Does an AAAA Lookup Work?
Learn what an AAAA record is, how it maps domains to IPv6 addresses, and how an AAAA lookup works to retrieve and verify DNS information.
Foundational
Does Squarespace Use DKIM for Email Authentication?
Learn whether Squarespace uses DKIM for email authentication, how DKIM works, and how it helps verify emails and improve domain security.
Foundational
Are Spam Emails Safe to Open? Risks and Email Security Tips
Learn how to safely handle spam emails, avoid phishing and malware, and protect your inbox with practical email security tips and authentication protocols.
Intermediate
How Noreply-DMARC-Support Helps Monitor Domain and IP Reputation
Learn how Noreply-DMARC-Support helps monitor domain and IP reputation, identify email security risks, and improve email deliverability.
Intermediate
Outlook DMARC Requirements: Microsoft’s New Email Authentication Rules Explained
Learn Microsoft’s Outlook DMARC requirements, including SPF, DKIM, DMARC alignment, DNS setup, enforcement, and best practices for email delivery.
Intermediate
DMV Breach Confirmed, Cisco ISE Patched, Revolut Data Scam
Cybersecurity news roundup covering the Florida DMV breach, Cisco ISE flaw, Revolut data leak, phishing campaigns, ransomware, and major cyberattacks.
Intermediate
Why am I still getting email spoofing warnings even though I have an SPF record on Bluehost?
Why do you still get email spoofing warnings with a Bluehost SPF record? Learn the common causes and how to fix SPF authentication issues.
Foundational
How to Check if Your Domain Is on an Email Blocklist
Check if your domain is on an email blocklist, understand why it was listed, and learn how to remove it to improve email deliverability.
Foundational
Phishing or Pharming? The Key Differences Every Email User Should Know
Learn the key differences between phishing and pharming, including attack methods, warning signs, DNS threats, and practical ways to stay protected.
Foundational
Honey Trap Scams Explained: How Social Engineering Targets Email Users
Learn how honey trap scams use social engineering, phishing, and emotional manipulation to target email users, plus practical tips to stay protected.
Advanced
What Is an SPF Void Lookup and How Can You Fix It?
Learn what an SPF void lookup is, why it occurs, how it affects email authentication, and practical ways to identify and fix SPF void lookup issues.
Foundational
How to Set Up an SPF Record for beget.ru
Learn how to set up an SPF record for beget.ru, configure DNS correctly, and improve email authentication, security, and deliverability.
Fix your SPF record, free
Give us a test drive for 30 days at no cost. Fix your broken SPF in less than 60 seconds!