Primary use
Sender-domain health
Check the sender DNS posture that affects product email, lifecycle messages, and campaigns.
Run a free check
Check a sender domain before the next release or send
Enter the domain used for product email, lifecycle messaging, or campaign traffic. The check scores sender posture and highlights issues that can affect inbox placement.
See SPF, DMARC, enforcement, and MX posture together
The free check returns one sender-domain score plus specific pass/fail signals. Use it before provider migrations, lifecycle campaigns, product launches, and deliverability incident reviews.
- SPF authorized sender posture
- DMARC policy presence and validity
- DMARC enforcement posture
- MX inbound routing posture
Key details
Signals
SPF, DMARC, MX
Review authentication, enforcement, and routing posture in one diagnostic view.
Best time
Before launch
Run the check before provider migrations, campaign sends, and deliverability reviews.
What this helps you evaluate
SPF
Validate authorized sender posture
Check whether the domain publishes SPF information that supports the services sending mail on its behalf.
DMARC
Review policy and enforcement
Confirm whether DMARC is present and whether the domain is still in observation mode or enforcing a stronger policy.
MX
Check mail routing posture
Review MX state after provider changes, domain moves, and DNS updates so routing changes do not surprise support or operations.