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PLAYBOOK

Practical guides to domains that must work.

Why each part of DNS, email authentication and monitoring matters — what breaks when it is missing, and how to check yours in under a minute.

Domain health score gauge and category bars86B · Domain HealthBlacklist100Mail server70Email auth55Web & SSL100DNS92Registration100Fix the red category first — it is the one costing you deliveries today.
Monitoring8 min read

How to Read a Domain Health Report and What to Fix First

A score is only useful if it tells you what to do next. Here is exactly how the StatusDNS health score is calculated, and the order to work through the findings.

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Monitoring alert versus customer complaint timelineWith monitoringDNS change / listing03:00Next check03:05Alert email / Slack03:06Fixed08:30Without monitoringSame changeMonday 03:00mail bouncing · nobody knowsCustomer complainsThursdayFixedFridayThe problem is identical. What changes is who finds out first — and how long it costs you.
Monitoring9 min read

Why Checking Once Is Not the Same as Monitoring

A green check is a statement about one moment. Most domain failures happen quietly afterwards — here is how to think about detection time, and what to watch.

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The blacklist cycle: compromise, listing, bounces, delistingCompromised mailboxor open relay1Spam sent fromyour IP2Spamhaus / SpamCoplist the IP3Bounces & spamfolder for all mail4Fix the cause,request delisting5Monitor so itnever repeats6The blacklistcycle
Monitoring9 min read

How Email Blacklists Work, and How to Get Off One

A blacklist listing stops your mail at the door, usually without warning. Here is how listings happen, what they cost, and how to get removed without being re-listed a week later.

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