Guides
Practical guides to email authentication: what the requirements are, how to fix the usual mistakes, and how to reach p=reject without losing mail.
- DMARC requirements in 2026 — the current state of mandatory email authentication
What Google, Yahoo and Microsoft require from senders in 2026: DMARC, SPF/DKIM alignment, one-click unsubscribe and spam-rate thresholds, explained.
- Fixing the SPF 10-DNS-lookup limit: a practical guide
Your SPF record breaks silently past 10 DNS lookups. How to count lookups correctly, three ways to get under the limit, and what not to do.
- The dmarcian alternative for European SMBs and agencies
Why teams look for dmarcian alternatives — Enterprise-gated API, USD pricing, partner-program white-label — and how MonitorBase compares, honestly.
- The Google/Yahoo sender requirements, as a working checklist
A practical pass/fail checklist for the Gmail and Yahoo bulk-sender requirements: authentication, alignment, unsubscribe, spam rate — with fixes.
- Moving DMARC from p=none to p=reject without losing mail
A staged, low-risk plan for DMARC enforcement: what to check in reports at each stage, how to use pct=, and the rollback that saves your weekend.
- Protecting your company against email spoofing and CEO fraud
How invoice fraud and CEO fraud abuse unprotected domains, what Danish businesses lose to it, and the DNS records that shut it down.
- DKIM key rotation without breaking your mail
Why DKIM keys should rotate, a realistic cadence for SMBs, and the two-selector procedure that makes rotation a non-event.
- Setting up SPF, DKIM and DMARC on Microsoft 365
The exact records and admin-center steps for Microsoft 365 email authentication, plus the onmicrosoft.com and hybrid pitfalls.
- Setting up SPF, DKIM and DMARC on Google Workspace
Exact records and admin-console steps for Google Workspace authentication, and how to keep newsletter tools aligned alongside it.
- Free DMARC monitoring — what actually exists, and where free ends
An honest map of free DMARC options: raw rua= reports, free tool tiers, and the point where paying beats parsing XML by hand.
- Parked domains are your unguarded flank — three records fix it
Unused domains can send email in your name. The null MX, SPF -all and DMARC reject records every parked domain needs, and why monitoring them matters.
- Webshop email deliverability: why order confirmations land in spam
Webshops juggle 3–5 sending systems. Why that breaks authentication, the alignment checklist per platform, and what Black Friday does to your limits.
- Protecting your company against email spoofing and CEO fraud
How invoice fraud and CEO fraud abuse unprotected domains, what European businesses lose to it, and the DNS records that shut it down.