Add nextsurplus.com email-authentication template

[bmoss2015]

Multi-tenant B2B SaaS CRM. Our customers are established small businesses. Our platform adds standard email authentication DNS records (SPF, DKIM, MX, DMARC) to each customer's own business domain via Domain Connect, so their outbound business email passes modern authentication checks. Standard SaaS use case — no bulk marketing, no cold outreach lists, no consumer-facing sends from our platform.

[github-actions]

PR Description Check Failed

The PR description is missing required elements. Please update it according to the PR template.

Details

Labels to add: Checklist of common problems not complete, PR description incomplete, Test links missing
Labels to remove: Forged editor links

PR description check FAILED:
  FAIL  'Type of change' section not found
  FAIL  'How Has This Been Tested?' section not found
  FAIL  'Checklist of common problems' section not found
  FAIL  'Online Editor test results' section not found
  FAIL  Template coverage: nextsurplus.com.email-authentication.json: no editor test link found (expected template id 'nextsurplus.com.email-authentication')

[github-actions]

✅ JSON Filename Check Passed

[github-actions]

❌ JSON Schema Validation Failed

Details

Checking schema for nextsurplus.com.email-authentication.json
Schema validation errors were encountered.
  nextsurplus.com.email-authentication.json::$.records[0]: {'type': 'TXT', 'host': 'send', 'pointsTo': 'v=spf1 include:%spf_include% ~all', 'ttl': 300, 'groupId': 'spf-sending'} is not valid under any of the given schemas
  Underlying errors caused this.

  Best Match:
    $.records[0]: 'data' is a required property
  Best Deep Match:
    $.records[0].type: 'A' was expected

  22 other errors were produced. Use '--verbose' to see all errors.
  nextsurplus.com.email-authentication.json::$.records[1]: {'type': 'TXT', 'host': '%dkim_selector%._domainkey', 'pointsTo': '%dkim_value%', 'ttl': 300, 'groupId': 'dkim-signing'} is not valid under any of the given schemas
  Underlying errors caused this.

  Best Match:
    $.records[1]: 'data' is a required property
  Best Deep Match:
    $.records[1].type: 'A' was expected

  22 other errors were produced. Use '--verbose' to see all errors.
  nextsurplus.com.email-authentication.json::$.records[3]: {'type': 'TXT', 'host': '_dmarc', 'pointsTo': 'v=DMARC1; p=none; rua=mailto:%dmarc_rua%', 'ttl': 300, 'groupId': 'dmarc-monitoring'} is not valid under any of the given schemas
  Underlying errors caused this.

  Best Match:
    $.records[3]: 'data' is a required property
  Best Deep Match:
    $.records[3].type: 'A' was expected

  22 other errors were produced. Use '--verbose' to see all errors.

[github-actions]

Linter error

nextsurplus.com.email-authentication.json

Level	Code	Note
error	DCTL0003	json error