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spf PROTOCOLHost: NS1 (IBM)Standard: RFC 7208

How to Configure Sender Policy Framework (SPF) on NS1 (IBM)

Specifies which IP addresses and email service providers are authorized to send email on behalf of your domain. Follow this verified implementation guide to deploy standard compliant SPF DNS records in NS1 (IBM).

Default SPF Record Syntax

// Authoritative RFC Example
v=spf1 include:_spf.example.com ~all

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 7208)

Extract TXT records on the root domain looking for "v=spf1".
Verify that there is strictly ONE SPF record (multiple records cause PermError).
Count total DNS lookups (RFC 7208 strictly limits recursive DNS evaluations to 10).
Ensure the record ends with "~all" (SoftFail) or "-all" (HardFail).
Live Validation Engine

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Verify propagation, check syntax formatting, and audit recursive lookups in 60 seconds with SubDomainWatch.

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