July 24, 2026
Configuring SPF and DKIM at Gandi
GandiMail, LiveDNS, the _mailcust.gandi.net include, the gm1 to gm3 DKIM selectors: the complete path to authenticating email for a domain hosted at Gandi.
Read →Blog — page 4
July 23, 2026
DMARC record examples to copy (and understand)
Ready-to-paste DMARC record templates — monitoring, quarantine, reject, parked domain — with per-provider settings and the publishing pitfalls to avoid.
Read →July 23, 2026
Setting up SPF and DKIM on OVHcloud
OVHcloud MX Plan, Email Pro and Exchange each need their own SPF and DKIM records. The DNS zone, the default SPF trap, CNAME selectors, checks.
Read →July 22, 2026
The DMARC subdomain policy: sp and np
Hardening the root domain isn't enough if the subdomains stay open. How the sp and np tags close that side door — including non-existent subdomains.
Read →July 21, 2026
Rolling out DMARC gradually, after the end of pct
The pct tag hardened DMARC in percentage steps. DMARCbis removed it. Here's how to run a safe, gradual rollout without it.
Read →July 20, 2026
p=quarantine or p=reject: which one to choose?
The two enforcing DMARC policies don't share the same risk profile. What each actually does to failing mail, and how to decide for a given domain.
Read →July 19, 2026
Readiness checklist: when is a domain ready for p=reject?
The conditions to meet before hardening a DMARC policy from p=none to p=reject: a pre-flight checklist for enforcement with no legitimate mail lost.
Read →July 18, 2026
DMARC forensic reports (RUF) and privacy: what to know
DMARC RUF reports can contain personal data from senders. What RUF contains, why few ISPs still send them, and how to stay GDPR-compliant.
Read →July 17, 2026
ri= in DMARC: reporting frequency and what it changes
The DMARC ri= tag requests a reporting interval that ISPs largely ignore. What it means, the values seen in the wild, and why 86400 is the standard.
Read →July 16, 2026
The best tools to analyze DMARC reports
DMARC reports are raw XML. Tools exist to aggregate, visualize and turn them into an action plan. An overview of free and paid options, and how to choose.
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