DMARC checker
Shows the DMARC policy receivers apply to your domain, including one inherited from the parent domain when a subdomain has no record of its own.
The rest of the domain
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How to read it
p=none only asks for reports. Mail that fails is still delivered. Gmail and Yahoo require a DMARC record from bulk senders, and expect it to move to enforcement.
p=quarantine sends failing mail to spam. p=reject refuses it.
sp= sets a different policy for subdomains. A subdomain without its own record uses the parent's sp, or its p if sp is not set.
rua= is where aggregate reports go. Without it you cannot see who is sending as you.
Other checks
SPF checker DMARC checker DKIM checker MX lookup Full domain report