September 14, 2026
Spoofing vs. business email compromise: two distinct threats
Spoofing, business email compromise, CEO fraud: three terms, three scopes. What each one covers, and which of the three vectors DMARC actually stops.
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Practical guides to email authentication — SPF, DKIM, DMARC, and the safe path to p=reject.
September 12, 2026
Infomaniak: SPF, DKIM and DMARC for mail
The automatic setup assistant when DNS is at Infomaniak, the SPF include, DKIM and DMARC, checking the zone — and Swiss data sovereignty.
Read →September 11, 2026
IONOS: SPF, DKIM and DMARC for mail and the DNS zone
IONOS: the current SPF include and the 1&1 legacy trap, enabling DKIM in the mail area, publishing DMARC, and checking the zone really is at IONOS.
Read →September 10, 2026
GoDaddy: publishing SPF, DKIM and DMARC in the DNS zone
Publishing SPF, DKIM and DMARC at GoDaddy: the Host field convention (@ and _dmarc), the GoDaddy mail include, and the entry mistakes that break it all.
Read →September 10, 2026
Salesforce: DKIM and DMARC alignment across the clouds
Salesforce authenticates each cloud separately: DKIM keys for Sales, Marketing and Pardot, the SPF include weighing on the 10 lookups, alignment.
Read →September 09, 2026
HubSpot: authenticating email (DKIM, SPF and DMARC)
HubSpot: the two DKIM CNAMEs, why SPF never aligns with the platform, how DMARC passes on DKIM alone, and why HubSpot in the root SPF fixes nothing.
Read →September 09, 2026
Klaviyo: dedicated sending domain and DMARC alignment
Why Klaviyo's shared sending domain fails DMARC, how the dedicated sending domain aligns SPF and DKIM, and why it is often the blocker before p=reject.
Read →September 08, 2026
Postmark: DKIM, custom Return-Path and DMARC alignment
Postmark: the domain-level DKIM key, the custom Return-Path that aligns SPF, message streams, DMARC alignment, and the mistakes that fail verification.
Read →September 06, 2026
Mailgun: SPF, DKIM and subdomain DMARC alignment
Mailgun: the sending subdomain that isolates reputation, the SPF and DKIM records, relaxed DMARC alignment, the US/EU region, and the usual mistakes.
Read →September 05, 2026
Zoho Mail: SPF, DKIM and DMARC alignment
Zoho Mail: the regional SPF include, the DKIM selector enabled in the console, favourable DMARC alignment, and the data-centre mistakes to avoid.
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