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dkim PROTOCOLHost: NS1 (IBM)Standard: RFC 6376

How to Configure DomainKeys Identified Mail (DKIM) on NS1 (IBM)

Cryptographically signs outbound emails using public/private key pairs to prove message integrity and authenticate sender domain. Follow this verified implementation guide to deploy standard compliant DKIM DNS records in NS1 (IBM).

Default DKIM Record Syntax

// Authoritative RFC Example
v=DKIM1; k=rsa; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQ...

Configuration Steps in NS1 (IBM)

  1. 1Log in to the NS1 Management Portal.
  2. 2Select "DNS" from the left menu and open your target zone.
  3. 3Search for the dangling subdomain record name.
  4. 4Click into the record details view.
  5. 5Click "Delete Record" and confirm in the modal.

Verification Checklist (RFC 6376)

Query the DNS selector TXT/CNAME record at <selector>._domainkey.yourdomain.com.
Validate key length (minimum 2048-bit RSA recommended, 1024-bit deprecated).
Confirm public key matching against outbound SMTP signature headers.
Ensure CNAME delegation targets an active, valid ESP key repository.
Live Validation Engine

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