We're using Exchange and recently had a missing DNS record and a DMARC issue. Is MXToolbox useful for ongoing reputation and DMARC monitoring, or would we need something else too?
Is MXToolbox useful for monitoring Exchange mail reputation and DMARC?
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r6+strobe
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It's a handy early warning tool. DNS and blacklist checks can catch obvious problems, and monitoring can alert you when a record changes or breaks. There are free checks as well as paid services for configuration and monitoring.
I wouldn't treat a reputation score as the final word on deliverability, though. Use it as a prompt to investigate rather than a complete picture of how recipients see your mail.
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For the DMARC side, the useful work is reviewing aggregate reports and figuring out which services are sending as your domain. Look at SPF and DKIM results alongside alignment for each sender, not just whether a record exists.
A DMARC reporting tool can make the XML easier to work through, especially if you have lots of senders. Suped is one option mentioned for source-by-source failure reporting. Exchange message trace and bounce data can help connect those findings to actual delivery problems.
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Before paying for another dashboard, decide who will review the alerts and DMARC reports and what they'll do when something fails. Monitoring is much less useful if nobody owns the follow-up.
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Even without a reported delivery issue, the reports can help identify senders and failures before a policy change makes them more disruptive.