Phishing vs. spear phishing: Why one attack is getting harder to catch (2025 update)
Learn about all the differences between spear phishing and phishing and ways to better protect your business in 2025.
FedRAMP compliance: A guide to the authorization process
Learn everything you need to know about FedRAMP compliance—what it is, why it matters, key benefits, and the essential steps to achieving it.
The complete guide to business email compromise (BEC) attacks in 2025
Discover the 2025 BEC numbers, trends, and 6-step defense checklist, plus a free Valimail domain audit and email solution.
Domain reputation check: What it is and ways to improve
Learn how to check your domain reputation score, understand what impacts it, and get actionable tips to improve your email domain reputation.
How to maximize your email marketing with BIMI logos
Learn how you can boost your inbox marketing and engagement by taking advantage of Brand Indicators for Message Identification (BIMI).
What is a tailgating attack (and how to prevent it)
Explore real-life examples and preventive strategies to help you recognize and deter tailgating attacks from threatening your business, employees, and customers.
How good email systems sometimes send fraudulent messages
Learn how good email systems (like PayPal’s) sometimes send fraudulent emails and what you can do to better protect your domain, customers, and brand.
Subdomain takeover: What it is and how to prevent it
Learn everything you need to know about subdomain takeover and how to protect your business from cybercriminals.
The complete guide to online brand protection (solutions and tips)
Learn everything you need to know to establish and maintain online brand protection and strengthen your digital presence.
How DMARC handles domains and subdomains in email addresses
Learn how DMARC handles domains and subdomains in email addresses to ensure you have the comprehensive protection you need to prevent spoofing.
Valimail DMARC Enforcement Report: Less than 50% of Companies in Banks and Financial Services Industry at Enforcement
Check out the highlights from our recent financial services DMARC enforcement report.
DMARC for Microsoft 365 customers
Within Microsoft’s Technical Documentation knowledge base, Microsoft provides information on many topics related to Microsoft 365 and email protection. This post describes what Microsoft does for its customers and what it doesn’t do concerning DMARC, DKIM, and SPF.