Email authentication · DMARC
See who’s sending email as you.
DMARC tells you every source sending mail in your name — the real ones and the spoofers — and lets you shut the impostors out. We set it up, watch it, and walk you all the way to enforcement, so your real mail lands and no one can fake you.
The same platform as the category leaders — 15% less.
Why it matters
Your domain is a target.
Anyone can send as you
Without DMARC enforcement, a stranger can put your domain in the From line — to your customers, your bank, your team. Most domains are wide open.
You can’t see your own mail
Invoices, newsletters, app notifications, that contractor sending on your behalf — you have no idea who’s authenticating until something breaks.
Inbox placement is now gated
Google and Yahoo now require DMARC to reach the inbox at any volume. No record, no enforcement — straight to spam.
The system
See. Fix. Enforce.
DMARC isn’t a record you set and forget — it’s a path to enforcement most people never finish. We finish it, and we keep it there.
See
Point one DNS record at us and the reports start flowing. Within days you have a live map of every source sending as your domain, with pass/fail and alignment.
Fix
We sort the legit senders from the impostors and get your SPF and DKIM aligned for each one — so real mail authenticates and nothing breaks.
Enforce
We move your policy from none to quarantine to reject — the only state that actually stops spoofing — and keep monitoring so it holds.
What you get
The whole picture, in plain English.
Every source, mapped
A clean dashboard of who’s sending as you, by volume, with DKIM/SPF alignment per source.
Alerts that matter
Know the moment a new or failing source appears — not a week later in a digest you ignore.
SPF & DKIM, handled
We read the reports and tell you exactly what to align — or do it with you. No guessing at DNS.
Guided to enforcement
A managed path from p=none to p=reject without breaking a single legitimate sender.
Pricing
Same platform. 15% less.
Feature-for-feature with the category leaders, priced 15% under — every tier, every year.
Personal
Free
one domain, learn DMARC
- 1 domain
- Live report dashboard
- Weekly digest
- Source visibility
Basic
Most buy this$20/mo
small business
- 1 domain
- Full reporting & history
- New-source alerts
- Guided path to p=reject
- Email support
Plus
$204/mo
multiple senders
- Up to 10 domains
- All sending sources
- SPF & DKIM management views
- Priority support
Enterprise
$510/mo
large orgs
- Unlimited domains
- Teams & roles
- Advanced reporting
- Dedicated support
Need many domains or a hands-off managed rollout? Talk to us about a custom plan.
Why Core City
The capability, under the price.
Managed, not just monitored
The tools show you a dashboard and leave. We actually drive your domain to enforcement and keep it there.
15% under, every tier
The same capability as the category leaders, priced below them — because we run our own pipeline, not a reseller’s.
A team that answers
A Detroit studio you can email and get a human — not a ticket queue in another time zone.
FAQ
Questions, answered.
What is DMARC, in one sentence?
It’s the standard that lets you say “only these sources may send email as my domain” — and tells receivers to reject anyone else.
How hard is setup?
You publish one DNS record pointing reports at us. That’s it — data starts arriving within 24–48 hours, and we take it from there.
Will turning this on break my email?
No — that’s the whole point of doing it in stages. We stay in monitor mode until every legitimate sender is aligned, then move to enforcement. Nothing goes dark.
How are you cheaper than the big names?
We run our own ingestion pipeline instead of reselling someone else’s, so we pass the savings on — the same platform, 15% less at every tier.
Can you just handle it for us?
Yes. The managed path is the default — we read the reports, align your senders, and walk you to p=reject. You get a dashboard and a monthly summary, not homework.
Lock your domain down.
Start free and see who’s sending as you within days. When you’re ready, we take you all the way to enforcement.
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