How to Set Up DKIM for Constant Contact

Enable DKIM for Constant Contact by publishing CNAME records that allow Constant Contact to sign your marketing email.

Quick Answer — The Record You Need

Record Type

CNAME

Host / Name

ctct1._domainkey

Value

ctct1.domainkey.constantcontact.com

Constant Contact provides two CNAME records (ctct1 and ctct2) during self-authentication.

Step-by-Step Setup

Log in to Constant Contact

Go to app.constantcontact.com and sign in.

Go to self-authentication

Navigate to Account Settings > Self-Authentication.

Get the DKIM records

Constant Contact displays the CNAME records needed for DKIM.

Add the CNAME records to DNS

Create the CNAME records in your DNS provider.

ctct1._domainkey.yourdomain.com  CNAME  ctct1.domainkey.constantcontact.com
ctct2._domainkey.yourdomain.com  CNAME  ctct2.domainkey.constantcontact.com

Verify in Constant Contact

Click "Verify" in the self-authentication settings. Once DNS propagates, DKIM will activate.

Common Gotchas

Constant Contact uses CNAME records for DKIM with selectors ctct1 and ctct2.
Both CNAME records must be added for complete DKIM configuration.
Self-authentication in Constant Contact handles both SPF and DKIM together. Complete the full process for best results.

Verify Your Setup

After adding your DNS records, use our free DKIM checker to verify everything is configured correctly. DNS changes typically propagate within minutes, but can take up to 48 hours.

Frequently Asked Questions

What DKIM selectors does Constant Contact use?

Constant Contact uses ctct1 and ctct2 as DKIM selectors, published as CNAME records.

Does Constant Contact rotate DKIM keys?

Yes. Since DKIM records are CNAMEs pointing to Constant Contact-managed DNS, they can rotate keys without requiring your DNS changes.

Is DKIM required for Constant Contact?

Strongly recommended. DKIM improves deliverability and is needed for DMARC alignment.