Resources
Email Authentication
Browse Palisade articles and guides in Email Authentication.
What does DMARC stand for? Meaning explained
DMARC stands for Domain-based Message Authentication, Reporting and Conformance. Here is what each word means and what the acronym tells you about how it works.
Jul 19, 2026
What is DANE and does your email need it?
DANE uses DNSSEC-signed TLSA records to force verified TLS on inbound SMTP. Here is how it works, the record you publish, and when your email needs it.
Jul 18, 2026
SSL vs TLS: what's the difference for email?
SSL vs TLS explained for email: TLS is the secure successor to the now-deprecated SSL protocol. Learn how they differ, which versions to use, and why.
Jul 12, 2026
How do I set up SPF for Google Workspace?
Google Workspace SPF setup: publish one TXT record — v=spf1 include:_spf.google.com ~all — at your domain root, merge other senders, and verify it resolves.
Jul 10, 2026
MXToolbox Alternatives (2026): Free Tools That Cover the Same Jobs
MXToolbox alternatives for 2026: free tools that cover MX, DNS, DMARC, blacklist, and header checks — plus what MXToolbox still does best.
Jul 9, 2026
How do I set up SPF and DKIM for Brevo (formerly Sendinblue)?
Set up Brevo (ex Sendinblue) email authentication: DKIM CNAME or TXT records, the spf.brevo.com include, DMARC alignment, and fixes for common errors.
Jul 9, 2026
How do I set up SPF and DKIM for HubSpot?
Set up SPF and DKIM for HubSpot: connect your sending domain, add both hs1/hs2 DKIM CNAMEs and your account-specific SPF include, then verify DMARC.
Jul 9, 2026
How Do I Set Up SPF and DKIM for Mailgun?
Mailgun SPF and DKIM setup: add the include:mailgun.org TXT record and DKIM key, verify your domain, and keep DMARC alignment on a mg. subdomain.
Jul 9, 2026
How Do I Set Up SPF and DKIM for Postmark?
Postmark handles SPF via its Return-Path, so skip the include. Real setup: one DKIM TXT record plus a custom Return-Path CNAME for DMARC alignment.
Jul 9, 2026
SPF record syntax explained: mechanisms and qualifiers
SPF record syntax explained: every mechanism (a, mx, include, ip4, all) and qualifier (+ - ~ ?), how they evaluate, and the 10-lookup limit that breaks records.
Jul 9, 2026
What is DMARCbis? DMARC's new RFC 9989 standard
DMARCbis is now official: RFC 9989, 9990, and 9991 replace RFC 7489. See what changed — the np tag, Tree Walk, and the tags that were retired.
Jul 4, 2026
How do I set up SPF and DKIM for Klaviyo?
Set up SPF and DKIM for Klaviyo with a branded sending domain: add the CNAME or NS records, verify, and activate — plus the DMARC step Klaviyo skips.
Jul 3, 2026
Feature spotlight: DMARC Agent
Generate white-labeled DNS and DMARC prospecting reports in Palisade. Show SMBs their email vulnerabilities and position your MSP as the trusted fix.
Nov 25, 2025
How Palisade DMARC monitoring protects email deliverability
DMARC monitoring finds every sender using your domain so you can reach enforcement without blocking your own mail. See how Palisade turns rua reports into
Oct 20, 2025
Feature spotlight: Whitelabel prospecting reports
Generate white-labeled DNS and DMARC prospecting reports in Palisade. Show SMBs their email vulnerabilities and position your MSP as the trusted fix.
Oct 16, 2025
How widely is DMARC adopted in Switzerland?
Swiss DMARC adoption varies: banks lag, some companies lead. Reporting rules and high phishing reports make authentication urgent.
Oct 7, 2025
Will La Poste require SPF, DKIM and DMARC for all senders?
La Poste will require SPF, DKIM and DMARC starting September 2025. Here’s what senders must do to keep emails out of spam.
Oct 7, 2025
What is URL spoofing and how can I stop it?
URL spoofing uses lookalike web addresses to steal logins and spread malware. Learn how fake URLs work, how to spot them, and how MSPs can block them.
Oct 6, 2025
How will 2024 DMARC rules change MSPs’ email protection for SMBs?
Discover how MSPs should adapt to 2024 DMARC enforcement: steps, tools, third‑party handling, and rollout plans for SMB clients.
Oct 3, 2025
8 Best DMARC Tools for MSPs: Expert-Tested Picks for 2025
Email spoofing got you worried? DMARC tools for MSPs have become essential weapons in the battle against sophisticated phishing attacks and domain…
Oct 2, 2025
Is DMARC the email security game-changer organizations need?
Learn how DMARC stops spoofing, works with SPF/DKIM, and why MSPs should add it. Use Palisade to check and manage your DMARC.
Oct 2, 2025
How does DMARC affect cyber insurance and claims?
How DMARC impacts cyber insurance eligibility, claims, and premiums — practical guidance and a checklist for IT teams.
Oct 2, 2025
How does a DMARC record protect my domain and improve email delivery?
Discover how a DMARC DNS record prevents spoofing, improves inbox placement, and protects your brand. Learn practical benefits and next steps.
Oct 2, 2025
How do I set up SPF and DKIM for Zoho Campaigns?
Learn how to configure SPF and DKIM for Zoho Campaigns with Palisade's guide. Follow simple steps to improve email authentication and protect your brand.
Oct 1, 2025
How Do I Set Up SPF and DKIM for Amazon SES?
Learn how to set up SPF and DKIM in Amazon SES, verify domains, add DNS records, and ensure email authentication passes DMARC.
Oct 1, 2025
What are Gmail and Yahoo error codes and how can I fix them?
Understand Gmail and Yahoo error codes, why they matter, and step‑by‑step fixes for email authentication compliance.
Oct 1, 2025
How Does Palisade Handle DMARC for Inbound Emails?
Discover Palisade's approach to DMARC for inbound emails, enabling anti‑spoofing and proper policy enforcement.
Oct 1, 2025
How can I set up Managed DMARC with Palisade?
Set up Palisade Hosted DMARC in minutes: add one CNAME, verify, and manage your policy from a slider — from p=none monitoring to full p=reject.
Oct 1, 2025
What Exactly Is a DMARC Failure Report and Why Should You Care?
Discover DMARC failure reports, their key fields, how to enable them, pros and cons, and best practices for managing real‑time email authentication failures.
Oct 1, 2025
How Can You Move from Reactive to Proactive Email Security Posture?
Learn how to transition from reactive to proactive email security with expert Q&A from our webinar. Get actionable steps for DMARC, DKIM, SPF, and BIMI.
Oct 1, 2025
Why am I seeing 'External Verification Failure' in DMARC?
Learn why DMARC “External verification failure” appears and how to fix it by adding a TXT record to the external domain’s DNS.
Oct 1, 2025
How can schools prevent security incidents?
Learn about recent education security incidents and how to safeguard schools with email authentication, ransomware protection, and best practices.
Oct 1, 2025
How can I add a DMARC record in Cloudflare?
Learn how to add a DMARC record in Cloudflare, improve email deliverability, and protect against phishing and spoofing.
Oct 1, 2025
Why have only 61% of manufacturers adopted DMARC?
Only 61% of top manufacturers have DMARC, and just 19% enforce reject. Learn why and how to protect email.
Sep 30, 2025
Why Should MSPs Offer Email Security Services?
Learn why MSPs must offer email security services, the key protocols (DMARC, SPF, DKIM, BIMI), and how to protect clients with cloud‑native solutions.
Sep 30, 2025
Why DMARC Fails and How to Fix It
Learn why DMARC fails, common alignment issues, and how Palisade tools can help you fix them.
Sep 30, 2025
Why is DMARC Vital for the Banking Industry?
The banking sector has always been a prime target for cybercriminals, and the shift to digital services has amplified the risk.
Sep 29, 2025
How Do Gmail’s New Blue Verified Checkmarks Impact BIMI Adoption?
Email authentication protocols like SPF, DKIM, and DMARC have become standard practice for protecting brand reputation, but many organizations still…
Sep 29, 2025
How does Palisade’s partnership with KnowBe4 improve email privacy?
Middletown, Delaware, USA – November 18, 2022: Palisade, the all‑in‑one email security and deliverability platform, announced the close of a $2.3 million…
Sep 29, 2025
What to Expect at Oracle’s Meet the Startups Event with Palisade?
Oracle selected Palisade after a rigorous risk‑management screening because our email security platform delivers measurable protection against phishing…
Sep 29, 2025
Why are 97% of Indonesian domains vulnerable to cyberattacks?
Recent analysis of Indonesia’s country‑code top‑level domains (ccTLDs) shows a staggering security gap.
Sep 29, 2025
What is Whaling Phishing and How Can You Prevent It?
Whaling phishing is a targeted email fraud that pretends to be a senior executive or high‑level official in order to trick recipients into revealing…
Sep 29, 2025
How can I create a DMARC record in DNS with Palisade?
Create a DMARC record in DNS with Palisade: what to publish, the exact TXT syntax, where it goes, how to verify it's live, and how to fix common errors.
Sep 29, 2025
What Were the Major Email Security Highlights in September 2021?
September 2021 saw a flurry of email‑related security news, ranging from regulatory actions to new protection tools. What regulatory action did the U.S.
Sep 29, 2025
How to Set Up DMARC, SPF, and DKIM on DreamHost
DMARC (Domain‑based Message Authentication, Reporting & Conformance) tells receiving mail servers how to handle unauthenticated mail from your domain.
Sep 29, 2025
Key insights from Splunk's State of Security report
Splunk’s inaugural State of Security Report compiles insights from 535 security leaders worldwide, offering a snapshot of today’s threat landscape and…
Sep 29, 2025
Why are targeted email attacks so hard to stop?
Targeted email attacks—often called spear‑phishing—are engineered to look like legitimate communication, making them notoriously hard to detect and stop.
Sep 29, 2025
How Does Business Email Compromise (BEC) Threaten Your Business?
Business email compromise (BEC) is a social‑engineering attack where cybercriminals target corporate email accounts to trick employees into sending money…
Sep 29, 2025
What Exactly Is Spoofing and How Can You Stop It?
Spoofing is a broad term for attacks where cybercriminals pretend to be a trusted source—whether an email sender, website, or even a phone number—to trick…
Sep 29, 2025
How can you stop spoofing attacks?
Imagine you get an urgent email that looks like it’s from your insurance provider, asking for personal details.
Sep 29, 2025
How Does IP Spoofing Work and How Can You Stop It?
IP spoofing remains a stealthy technique that lets attackers disguise their true location.
Sep 29, 2025
What were the biggest email security headlines in April 2022?
Welcome back to our weekly security roundup. This week’s focus is on three major email‑related incidents that could impact your organization’s defenses.
Sep 29, 2025
Why are my emails landing in spam and how can I fix it?
Getting your messages stuck in the spam folder is frustrating for any email marketer. It usually signals a fixable problem, not bad luck.
Sep 29, 2025
What do Google's updated DMARC reports reveal?
Google’s DMARC aggregate reports now include diagnostic details about why an email fails sender authentication requirements.
Sep 29, 2025
How Can Retail Brands Use BIMI to Boost Email Open Rates?
Brand Indicators for Message Identification (BIMI) lets a retailer display its logo next to the email in the inbox.
Sep 29, 2025
Why am I seeing DMARC failures and how can I fix them?
DMARC (Domain-based Message Authentication, Reporting, and Conformance) is a protocol that tells receiving mail servers how to handle messages that fail…
Sep 29, 2025
What’s the difference between DKIM and SPF and why does it matter?
SPF (Sender Policy Framework) is a path‑based authentication method that checks whether the sending server’s IP address is authorized to use the domain in…
Sep 29, 2025
What is Palisade Labs and how can it boost your email authentication?
Welcome to Palisade Labs – a dedicated sandbox inside the Palisade platform where you can explore cutting‑edge email authentication experiments before…
Sep 29, 2025
Should you DIY DMARC or use an automated service?
DMARC is an email authentication protocol that builds on SPF and DKIM, letting domain owners set policies for how unauthenticated mail should be handled.
Sep 29, 2025
How dormakaba keeps email security strong at scale
Mergers and acquisitions (M&A) can boost growth, expand market share, and streamline supply chains.
Sep 29, 2025
What are Microsoft's new email authentication rules?
Microsoft announced it will enforce the same email authentication standards that Google and Yahoo already require.
Sep 29, 2025
How can you effectively manage multiple DKIM records for your domain?
Managing several DKIM records across different services and subdomains can feel overwhelming, but a systematic approach makes it manageable and keeps your…
Sep 29, 2025
What’s the $50 B impact of BEC scams and how to stop them?
Business Email Compromise (BEC) scams have now been reported to cost organizations worldwide a staggering $50 billion.
Sep 29, 2025
What’s the current state of DMARC adoption in Japan?
Email fraud and spoofing is a global problem. That’s why Palisade aims to expand into Japan to promote DMARC and curb these threats. Quick Takeaways
Sep 29, 2025
How can you simplify the journey to DMARC enforcement?
Simplify DMARC enforcement: inventory senders from aggregate reports, fix SPF/DKIM alignment per service, ramp with pct, and automate the monitoring.
Sep 29, 2025
What can we learn from Will Boyd about deliverability?
Will reminds himself of past successes, recognizing that he’s overcome similar frustrations before, which fuels confidence.
Sep 29, 2025
What is email authentication and why does it matter?
Email authentication lets receiving servers verify that mail from your domain is authorized. Learn how SPF, DKIM, and DMARC work together and why it matters.
Sep 29, 2025
How can you resolve Yahoo and Gmail email error codes?
Google and Yahoo are tightening email authentication rules, and you may see new SMTP error codes when sending messages.
Sep 29, 2025
Are DMARC Failure Reports Worth the Trouble for Your Email Security?
DMARC forensic reports—often called failure reports—appear to offer instant insight into suspicious email activity.
Sep 29, 2025
Why must NZ government domains adopt new email standards?
New Zealand’s Digital Government has released the Secure Government Email (SGE) Framework, a modern set of technical controls that replace the legacy…
Sep 29, 2025
How Amazon SES + Palisade simplify bulk sender compliance
In recent years, the email ecosystem has seen a surge of initiatives aimed at tightening authentication standards.
Sep 29, 2025
How can you check and improve your email domain reputation?
Check your email domain reputation with the right tools, understand Google's real spam-rate thresholds, and fix the signals that push mail into spam.
Sep 29, 2025
Why does my DKIM signature fail alignment and how can I fix it?
DKIM can verify yet still fail alignment when the signing domain doesn't match your From: address. Here's why it happens and how to fix each cause.
Sep 29, 2025
Why do corporations struggle with DMARC enforcement?
The Online Trust Alliance (OTA) recently released its 2016 Annual Online Trust Audit, shedding light on how large enterprises, financial institutions, and…
Sep 29, 2025
What is a whaling attack and how can you stop it?
Whaling attacks are highly targeted phishing attempts aimed at the most senior leaders within an organization—CEOs, CFOs, board members, and other…
Sep 29, 2025
Why Is My BIMI SVG Format Causing Logo Issues?
Have you spent hours setting up your BIMI record only to find your logo is nowhere to be found in people’s inboxes?
Sep 29, 2025
How can you win over execs to invest in DMARC and email security?
Getting budget for an email security stack can feel like selling ice to penguins.
Sep 29, 2025
How can you protect your brand from impersonation with anti‑spoofing?
Anti‑spoofing technology and features might not be the flashiest part of your email stack, but they can make or break your email program—and your brand’s…
Sep 29, 2025
What are the key elements of DMARC syntax?
DMARC (Domain‑based Message Authentication, Reporting, and Conformance) is the protocol that protects your brand from email impersonation.
Sep 29, 2025
What is an AAAA DNS record (Quad‑A explained)?
What an AAAA (Quad‑A) DNS record is, how it maps a domain to an IPv6 address, how it differs from an A record, and how to add and test one correctly.
Sep 29, 2025
How can AI and zero trust improve email security?
Email security isn’t what it used to be. Today’s cybercriminals wield AI to craft phishing emails that can fool even senior executives.
Sep 29, 2025
What do Google's DMARC reports say about sender failures?
Google has rolled out a helpful update to its DMARC aggregate reports: new diagnostic details about why an email fails sender authentication requirements.
Sep 29, 2025
Fixing SPF Alignment (DMARC) — Full Guide
If your DMARC report says “SPF not aligned” (or you’re seeing p=quarantine/reject hits you didn’t expect), this guide is for you.
Aug 11, 2025
What is DKIM2? The Next Generation of DKIM Explained
Explore DKIM2, an advanced email authentication protocol preventing spoofing with robust cryptographic signatures.
May 15, 2025
What is Spoofing? Email Spoofing Attacks Explained
Learn about spoofing, fake email attacks, and how to protect with email authentication.
May 13, 2025
What is MTA-STS? SMTP Security Policy Explained
What MTA-STS is, how it forces TLS on inbound SMTP, the DNS record and policy you publish, and how it pairs with SPF, DKIM, and DMARC to secure email.
May 12, 2025
What is a RUF? DMARC Forensic Reports Explained
Explore RUF in DMARC, the URI for forensic email failure reports. Learn how it helps detect spoofing and troubleshoot authentication issues.
May 12, 2025
What is a VMC? Verified Mark Certificates for BIMI
Learn about VMCs, digital certificates that verify logo ownership for BIMI. Discover how they enhance email trust and branding with DMARC.
May 12, 2025
What is a DNS? Domain Name System Basics Explained
Discover DNS, the internet’s address book. Learn how it translates domain names to IP addresses, supports email, and enhances security with SPF and DMARC.
May 12, 2025
What is an MX Record? Mail Exchange DNS Explained
What an MX record is, how mail servers use priority to route email, the exact records for Google Workspace and Microsoft 365, and how to check yours.
May 12, 2025
What is SPF? Sender Policy Framework Explained
Explore SPF, the email authentication tool that prevents domain spoofing.
May 12, 2025
What is BIMI? Brand Indicators for Message Identification
What BIMI is, how it displays your verified logo in the inbox, the DMARC and certificate (VMC or CMC) requirements, and which email clients actually support it.
May 12, 2025
What is DMARC? Email Authentication Explained Simply
What DMARC is, how it uses SPF and DKIM alignment to stop spoofing, the exact DNS record to publish, and what changed when RFC 9989 replaced RFC 7489.
Apr 23, 2025
Why You Should Use Cloudflare for DNS Management and How to Set It Up
Why use Cloudflare for DNS: faster resolution, easy SPF/DKIM/DMARC record management, and free DNSSEC — with a step-by-step setup guide.
Aug 9, 2023
How to make your Company logo BIMI Compatible
Make your logo BIMI-compatible: convert it to SVG Tiny PS, meet size and trademark requirements, and display it next to your emails in Gmail.
Aug 9, 2023
How to Convert your Company Logo to SVG
Every successful brand needs a memorable logo, but did you know the format of your logo plays a pivotal role in how well it performs?
Aug 9, 2023
Google switches to DKIM for Email Authentication
In 2023 a flaw let scammers earn Gmail's blue checkmark via SPF. Here's why Google now requires DKIM for BIMI — and what it means for senders today.
Aug 9, 2023
Mastering DMARC: Safeguarding Your Domain with Email Authentication
Master DMARC: how it builds on SPF and DKIM, what each tag does, the three policies, how to roll out safely to enforcement, and what RFC 9989 changed.
Aug 9, 2023
How to Fix "No DMARC Record Found" in 2023
Fix the 'No DMARC record found' warning: create and publish a DMARC TXT record in DNS, then verify it — a step-by-step guide with examples.
Aug 9, 2023
What is a DNS A Record: Understanding the Fundamentals
DNS A records explained: how they map domains to IP addresses, how to create and check them, and how they differ from CNAME and AAAA records.
Aug 9, 2023
Why Should You Pay Attention to MTA-STS and Email Security
MTA-STS, also known as Mail Transfer Agent-Strict Transport Security, is a mail protocol designed to encrypt inbound emails with a secure layer.
Aug 9, 2023
How To Get a Verified Mark Certificate (VMC)
A Verified Mark Certificate is a digital document that authenticates the legitimacy of a brand’s logo.
Aug 9, 2023
SPF Record Generator: Step-by-Step Setup Guide
Generate a correct SPF record for your domain: syntax, include mechanisms, and the -all vs ~all choice — plus a free SPF generator tool.
Aug 9, 2023