Nobody breaks their own email on purpose.

Why a check is not enough on its own

A check tells you whether today is fine. That is genuinely useful once, and almost useless repeatedly.

The failures that cost money are slow. Mail keeps sending and placement softens over several weeks. Somebody notices when a campaign underperforms badly enough to investigate.

By then the change is a month old and nobody remembers what they touched. Watching daily turns that into an email on the day it happened.

What I watch

The ten lookup limit

Your SPF record is allowed ten DNS lookups. Past ten it fails entirely rather than degrading. I tell you at nine, before anything has broken.

Signing keys appearing and disappearing

A key that vanishes means that platform’s mail can no longer be verified. A key that appears means somebody connected something. Both are worth knowing about.

Your policy being loosened

A policy quietly moved back to none means failing mail now reaches inboxes as you. That is usually somebody troubleshooting, and usually forgotten afterwards.

Your mail servers changing

This decides where mail sent to you is delivered. A change you did not make is the most urgent thing here.

Blocklists

Checked against the addresses that actually send for you, not only the ones that receive. A listing is a symptom, so I tell you what changed around it.

What you will not get

You will not get a daily email saying everything is fine. That gets filtered within a fortnight, and then the one that matters gets filtered too.

You will not get an alert because a lookup timed out. A slow nameserver is not a record disappearing. A monitor that cries wolf is worse than no monitor at all.

You will not get a score. A number that drifts on its own tells you nothing about what changed.

What an alert looks like

The record as it was, and the record as it is now. One sentence on what it costs you. It is built to be forwarded to whoever runs your DNS.

That person has no context and did not ask for the email. If they have to open a dashboard to understand it, they will not.

Stopping

Every email carries a link that pauses or cancels it. No account, no password, and no conversation with me first.

Cancelling keeps your history. If you come back, it starts from what it already knows rather than from nothing.