Know every system sending email from your domain
Sender inventory and change detection for your email infrastructure. Start with a free scan.
Who sends email from your domain?
DMARC-powered sender inventory and change detection. Get alerted when something new appears or authentication breaks.
Sender Inventory
A living map of every system sending email from your domain. See IP addresses, service names, volumes, and authentication health at a glance. Know exactly who is sending as you.
Change Detection
Get alerted the moment a new sender appears, a known sender disappears, or SPF/DKIM authentication breaks. No more finding out from an angry client or a bounced campaign.
Actionable Insights
Every alert tells you what broke, the likely cause, and what to fix. Weekly "what changed" reports give you a summary without digging through raw data.
How it works
Up and running in minutes, not days.
Add your domain
Point your DMARC reports to us. Setup takes about two minutes.
We analyze your reports
As DMARC reports arrive, your sender inventory builds up. Every system, its volume, and authentication status.
Get alerted on changes
New sender? Authentication failure? We notify you immediately and tell you what to do about it.
Built for teams managing email at scale
Whether you manage one domain or hundreds, you get a clear picture of what is sending and what changed.
MSPs & IT Providers
Monitor all your client domains from one dashboard. Know when a client’s email setup changes before they call you about it.
Learn about MSP plans →Multi-Vendor Organizations
Marketing uses Mailchimp, sales uses HubSpot, support uses Zendesk. Do you know what is actually sending as your domain?
Agencies & Consultants
Deliver ongoing email infrastructure visibility to your clients. Prove value with weekly change reports.
Frequently asked questions
- How is this different from other DMARC tools?
- Most DMARC tools focus on compliance, helping you set a policy and get to enforcement. DMARC Observer focuses on operational visibility: who is sending email from your domain, and what changed. Infrastructure monitoring, not a compliance checklist.
- How long until I see data?
- DMARC reports are sent by email receivers like Google and Microsoft roughly once a day. You will typically see your first sender inventory within 24 to 48 hours of pointing your DMARC reports to us.
- Do I need DMARC set up already?
- No. If your domain doesn’t have a DMARC record yet, we’ll help you create one during setup. The free domain checker above will tell you where you stand right now.
- Can I monitor multiple domains?
- Yes. Our Growth plan supports 10 domains, Pro supports 50, and our MSP plans start at 100. All managed from a single dashboard.
Start with a free scan
See your domain's email authentication status in seconds. No signup required.