Constant Contact emails going to spam? Check your domain in 60 seconds.
We verify your domain's self-authentication records, DMARC, SPF, MX and 24+ blocklists. One honest note: Constant Contact issues per-account record names, so we probe the usual ones and tell you exactly what we can and can't see.
Free · no signup · unlimited checks · reads public DNS only
Constant Contact works out of the box without touching your DNS — which is exactly the problem. Without self-authentication, every campaign is signed by Constant Contact's shared domain: your own domain builds no sending reputation, and under Gmail and Yahoo's 2024 bulk-sender rules, unauthenticated bulk mail is progressively junked. Self-authentication (Account → Advanced settings) gives you CNAME records that let Constant Contact sign as YOUR domain, with key rotation handled for you.
A caveat we'd rather state than hide: Constant Contact issues record names per account, so a fixed check like this one probes the commonly issued names. If we find them, you're verifiably set up. If we don't, that can mean either 'not set up' or 'set up under account-specific names' — we'll say so plainly, and the full check of your SPF, DMARC, MX and blocklists is exact either way.
How Constant Contact setups actually fail
Self-authentication never enabled
The default state, and the most common. Campaigns send fine — from Constant Contact's reputation, not yours. If you've never visited Advanced settings → Add self-authentication, this is your setup, and it's the first thing to fix.
The TXT variant with a stale key
Constant Contact offers a DKIM TXT option alongside the recommended CNAMEs. TXT keys don't rotate automatically — if the key was replaced account-side and your DNS still serves the old one, signatures fail quietly. The CNAME method avoids the whole class of problem.
DMARC missing on the sending domain
Whatever Constant Contact signs, DMARC on your domain is yours to publish and now table stakes for bulk senders. v=DMARC1; p=none at _dmarc.yourdomain.com is the compliant starting point.
Fix anything above in your Constant Contact dashboard following the official Constant Contact setup guide, then re-run the check — DNS changes usually show within minutes.
Record names and provider behavior on this page were last verified against Constant Contact's official documentation on 12 July 2026.
Questions, answered plainly
Why are my Constant Contact emails going to spam?
The most likely cause is sending without self-authentication, so your campaigns carry Constant Contact's shared reputation instead of your domain's. Enable self-authentication with CNAME records in Account → Advanced settings, publish a DMARC record, and verify your SPF and MX are healthy — this checker covers the domain side in one pass.
How do I self-authenticate my domain in Constant Contact?
My Account → Advanced settings → Add self-authentication → choose 'Self-authenticate using DKIM CNAME records', then add the records shown to your DNS exactly as given and click Check status after they propagate (up to 24–48 hours).
Why can't this tool always see my Constant Contact records?
Constant Contact assigns record names per account rather than one fixed name for everyone. We probe the commonly issued names; if yours differ, our 'not found at the usual names' result just means you should compare the names in your Constant Contact settings against your DNS — the rest of the report is exact regardless.
Does Constant Contact require DMARC?
Gmail and Yahoo do, for bulk senders, since February 2024 — which in practice makes it required for any list of size. Constant Contact recommends it and it's one TXT record on your domain.
The full guide
Constant Contact emails going to spam? The setting nobody turned on
Constant Contact works out of the box, which is exactly the problem: self-authentication is optional-looking and off by default. What it does, how to enable it, what to check.
Read the guide →More free checkers
A passing check is a snapshot: records that are right today drift, expire and get overwritten, and nobody gets notified. That slow rot is what we call deliverability decay, and it has its own curriculum in Decay University.