Email Authentication9 min read
How do I set up SPF and DKIM for Microsoft 365?
Configure SPF and DKIM for a Microsoft 365 custom domain, enable signing in Defender, and validate alignment with DNS, headers, and DMARC reports.
Read article →Practical insights for safer email.
Guides, product updates, and email security news from the Palisade team.
Page 5
More resources
60 articles
Security8 min read
Dumpster Diving: The Hidden Cyber Threat Lurking in Your Trash
Discover dumpster diving, a cyber threat exploiting discarded data, and learn secure disposal strategies.
Read article →
Email News5 min read
How to Flush DNS Cache on Mac, Windows & Linux
Clear your DNS cache in one command (macOS, every Windows version, and Linux distros) plus how to flush browser DNS and confirm it worked.
Read article →
Email News8 min read
How to Create a BIMI Record: A Step-by-Step Guide
Set up BIMI step by step: enforce DMARC, create an SVG Tiny PS logo, choose a VMC or CMC, publish the TXT record, and troubleshoot display.
Read article →
Email News8 min read
Unmasking the Secrets of IP Spooking
IP spoofing lets attackers fake source addresses to bypass filters and launch attacks. Learn how it works and how to defend your network.
Read article →
Email News10 min read
SMS Spoofing: Understanding and Mitigating Risks
SMS spoofing lets attackers fake sender IDs in text messages. Learn how smishing works and how to protect your business and customers.
Read article →
Email News8 min read
DNS TXT Records Explained: Format, Uses & Examples
What a TXT record is, the exact syntax, and how TXT records power SPF, DKIM, DMARC, and domain verification, with copy-paste examples.
Read article →
Email News6 min read
DMARC Policy Not Enabled: How to Fix It Safely
Fix the 'DMARC policy not enabled' warning: check p=none, verify every legitimate sender, then move to quarantine and reject without disrupting real mail.
Read article →
Email News7 min read
The ABCs of DNS PTR Records
PTR records map your sending IP back to your hostname. Learn how reverse DNS and FCrDNS work, why Gmail and Outlook now enforce them, and how to set one up.
Read article →
Email News6 min read
Protect Yourself from Malicious Email Attachments | Tips & Prevention
Malicious email attachments deliver most malware. Learn the file types to watch, how to verify senders, and defenses that stop infected files.
Read article →
Master Guides33 min read
Master Guide: Obtaining your blue verified Gmail checkmark
Gmail's blue checkmark needs DMARC enforcement, a BIMI record, an SVG Tiny PS logo, and a VMC. Setup steps, costs, timelines, and free checkers.
Read article →
Master Guides6 min read
How to Set Up a BIMI Record (Cloudflare & Any DNS)
Create and publish a BIMI record so your logo shows in inboxes: exact DNS values, a Cloudflare walkthrough, and a free BIMI checker to verify it.
Read article →