Tools DMARC report reader
DMARC report reader
Free for subscribersSee every service sending email as you.
DMARC reports are the XML files Google, Microsoft and others send about your domain. Upload them here and see, in plain English, every service that sent email as you, how much of it passed and what to fix before you turn DMARC up.
- Plain English, not XML
- Every sender named
- Free for subscribers
Built with Workers, D1
Subscribe free to use the DMARC report reader, up to 20 report files a day, 10 MB each. Subscribers can use every tool on paulobrien.dev and hear when there's something new.
Files are read and thrown away. Nothing from them is kept.
brightwell.co.uk
// what it checks
What you get.
Who sends as you
Every service that sent email using your domain, named, with how many emails and whether they passed.
What to fix
The SPF or DKIM setting each failing service needs, step by step.
When to turn it up
Whether it's safe to move from p=none to quarantine or reject without losing real email.
// how it works
Three steps.
- Find your reports
Google, Microsoft and others email them to the address in your DMARC record, usually as .zip or .gz files.
- Drop them in
Up to 10 at a time. They're read on the spot and thrown away.
- See who's sending
Each service named, with how much passed and the setting it needs if it failed.
// questions
Good to know.
I don't get any DMARC reports. Why?
Your DMARC record needs a rua= address for reports to be sent to. The DNS checker shows your DMARC record and the line to add.
Are my files kept?
Files are read and thrown away. Nothing from them is kept.
When can I move to quarantine or reject?
Once every service you send with passes. The reader tells you when it looks safe to turn DMARC up without losing real email.
// more tools
More tools I've built.
DNS checker
Check your domain's email records: SPF, DKIM, DMARC, MX, MTA-STS, blocklists and expiry.
Try itMail tester
Send one email to a test address and get a spam score out of 10, with what to fix.
Try itIP checker
Find out where an email really came from: who runs the IP address, whether it's a VPN and whether it's on an email blocklist.
Try itStay in the loop
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