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DKIM guides

Setting up DKIM at All-Inkl

DKIM at All-Inkl: the TXT (DKIM) record in the KAS with your own selector — step by step with verification.

DKIM at checkdomain: one switch under Emails → Security — enables SPF and DKIM together.

DKIM at Cloudflare: publish the public key as a selector._domainkey TXT record — for Cloudflare Email Service or your own mail server.

DKIM at domainfactory: no wizard, but a TXT record with your sending service's key.

DKIM at Gandi: one toggle with LiveDNS — plus the 3 CNAME entries for external DNS.

DKIM at GoDaddy: no bare-domain wizard — your mail product generates the key, you publish it as a CNAME or TXT record.

DKIM for Google Workspace: generate the key in the Admin console, enter the google._domainkey TXT at your domain host.

DKIM at Hetzner: konsoleH generates the key pair automatically — plus the TXT route for external DNS and your own servers.

DKIM at IONOS: active by default — plus the 3 CNAME entries for external DNS.

DKIM for Mailcow: generate the key in the UI, put the dkim._domainkey TXT in DNS — step by step with verification.

DKIM for Microsoft 365: two CNAME selectors, activation in the Defender portal — incl. the new format since May 2025.

DKIM at Netcup: two CNAME entries in the CCP — key1 and key2 are both mandatory.

DKIM at OVHcloud: one-click activation for MX Plan/Email Pro, or two CNAMEs for external DNS — step by step.

DKIM at Amazon Route 53: CNAME records for SES-style delegation or a TXT public key for your own server — with the Route 53 apex caveat.

DKIM at Strato: automatically active via smtp.strato.de — plus the CNAME selectors for your own nameservers.

DKIM at united-domains: automatically enabled for mailbox domains — except with external nameservers.