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Constant Contact DMARC or Authentication Failing

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Workaround available Web Updated November 13, 2026Based on 3 user reportsHow we research

Quick answer

DMARC fails when your From domain is not self-authenticated with Constant Contact. SPF cannot align through Constant Contact, so DKIM alignment is what makes DMARC pass.

Most likely fix: Self-authenticate

How to fix it

Try these in order — the most common fix is first.

  1. 1. Self-authenticate

    1. Use a From address on your own domain
    2. Generate CNAME and DMARC records via Constant Contact's self-authentication article
    3. Add them in your DNS and wait for verification
    Did this fix it?

  2. 2. Understand SPF

    1. You do not need Constant Contact IPs in your SPF record
    2. SPF alignment cannot pass via Constant Contact; DMARC only needs DKIM alignment
    Did this fix it?

  3. 3. Verify

    1. Send a test to Gmail, open Show original and check SPF, DKIM, DMARC results
    2. Remove duplicate or conflicting DNS TXT records
    Did this fix it?

Symptoms

Headers show DMARC fail, or Gmail/Yahoo/Outlook reject or junk your campaigns.

Why it happens

  • No DKIM records for your domain in DNS
  • DKIM present but From domain does not match
  • Conflicting TXT records
  • Sending from a free webmail address

This guide also covers

  • constant contact dmarc fail
  • constant contact dkim setup
  • constant contact spf

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