DMARC for marketing platforms

How do I set up DMARC for Constant Contact?

Constant Contact self-authentication generates CNAME or TXT records and DMARC policy details inside your account. The exact values are not published, so take them from there.

The DNS records for Constant Contact

SPF: Not part of Constant Contact's self-authentication article

No SPF value to copy for this platform

The article does not mention SPF. Use only what Settings shows you, and plan your alignment on DKIM.

DKIM selector: Generated per account, often numeric (example: 10008432)

CNAME or TXT at the host Constant Contact generates

Constant Contact says it uses numbers for the selector, but not always. Take yours from Settings > Advanced settings > Add self-authentication.

Values in angle brackets are specific to your account. Copy the real ones from Constant Contact rather than from this page.

Alignment caveats

✓Self-authentication is what lets mail sign with your own domain, so enforcing DMARC before you set it up risks your campaigns.
✓A domain can publish only one DMARC record. If you already have one, don't add a second; check it against the policy details Constant Contact shows.

From p=none to p=reject with Constant Contact

Publish v=DMARC1; p=none; rua=mailto:<your-business-id>@mail.yourdmarc.online, or build it with the DMARC generator. Delivery does not change at this stage.
Add the records above, then verify them with the SPF checker and the DKIM checker, entering your selector.
Complete self-authentication, then send a campaign and confirm the aligned DKIM pass in your reports before tightening the policy.
Move to p=quarantine when your legitimate mail passes, and watch the reports for anything you missed.
Move to p=reject with sp=reject. Read the enforcement guide for what tends to break, and keep monitoring afterwards.

Sources

Taken from Constant Contact's own documentation, checked on 1 November 2026. Providers change these, so their setup screen wins over this page.

Constant Contact: Self-authenticate your emails

See how Constant Contact really does on your domain

Check a real message against the Gmail, Yahoo and Outlook.com sender rules, or test whether a stranger can send mail as your domain. Both are free.

Check a real message

Test for spoofing

Frequently asked questions

What SPF record does Constant Contact need?

Not part of Constant Contact's self-authentication article. The article does not mention SPF. Use only what Settings shows you, and plan your alignment on DKIM.

What DKIM selector does Constant Contact use?

Generated per account, often numeric (example: 10008432). Constant Contact says it uses numbers for the selector, but not always. Take yours from Settings > Advanced settings > Add self-authentication.

Will Constant Contact mail pass DMARC alignment?

Only once a passing SPF or DKIM result is on your From domain or its organizational domain. Self-authentication is what lets mail sign with your own domain, so enforcing DMARC before you set it up risks your campaigns.

How do I reach p=reject with Constant Contact?

Start at p=none with a rua address, finish the Constant Contact setup, then read your reports. Complete self-authentication, then send a campaign and confirm the aligned DKIM pass in your reports before tightening the policy. Move to p=quarantine, then p=reject, once your legitimate mail passes.

With yourDMARC, boosting email campaign deliverability, safeguarding brand identity, and fortifying business reputation is a breeze.

As a global team, we’re always available. Let’s talk!

Download to read the eBook

Get Support

Contact Now

Try yourDMARC