DMARC for Multi-Tenant SaaS: Handling Customer Subdomains
September 13, 2026 · MyDMARC Team
When your product sends email on behalf of thousands of customer subdomains, DMARC gets complicated fast. Here's how to think about it.
Blog
News, guides, and updates from the MyDMARC team.
How to Configure SPF and DMARC for Non-Sending Domains
September 9, 2026 · MyDMARC Team
Domains that never send email still need protection against spoofing. Learn how to configure SPF, enforce DMARC, monitor attempted use, and add null MX when a domain also receives no mail.
Why Your DMARC Policy Should Never Stay at p=none Forever
August 30, 2026 · MyDMARC Team
Monitoring mode is a starting point, not a destination. Here's how to move from p=none to full enforcement without breaking your mail.
5 Signs a Sending Source Is Spoofing Your Domain
August 23, 2026 · MyDMARC Team
Your DMARC aggregate reports are full of IP addresses you don't recognize. Here's how to tell which ones are a real threat.
Reading a DMARC Aggregate Report Without Losing Your Mind
August 9, 2026 · MyDMARC Team
Aggregate reports arrive as gzipped XML nobody wants to read. Here's what's actually inside one, how to interpret the important fields, and why reading them by hand gets old fast.
DMARC Setup for Indie Devs and Small Teams: The $0-to-$1/Month Stack
August 4, 2026 · MyDMARC Team
You don't need an enterprise security budget to get DMARC right. Here's a complete setup that runs for free, with one optional dollar-a-month upgrade.
SPF vs DKIM vs DMARC: What's the Difference?
August 2, 2026 · MyDMARC Team
SPF, DKIM, and DMARC get lumped together in every setup guide, but they check three different things. Here's what each one actually does, and why DMARC doesn't work without the other two.