Home / Free tools
Free email toolsFree tools for Outlook, Microsoft 365 and email
Check why an email went to junk, build an Outlook rule without the wizard, or write your out-of-office reply in seconds. Built by an email admin, free to use, and nothing you paste is stored.
All free tools
New tools are added here as they go live.
Email Header Analyzer
Paste headers and see SPF, DKIM, DMARC, the delivery route and Microsoft 365 spam scores in plain English.
Checks in code, AI explainsOpen tool Outlook and Microsoft 365Outlook Rule Builder
Describe a rule in plain English and get the steps for new and classic Outlook, plus the PowerShell command.
AI builds, code checksOpen tool WritingOut of Office Message Generator
Get three ready out-of-office replies, the Outlook steps and the PowerShell command with your dates filled in.
AI drafts, template backupOpen toolNo tool matches that yet.
Why use these tools
Small tools that answer one question well, with the steps to fix what they find.
Made by an email admin
Every tool comes from questions I answer for Outlook and Microsoft 365 users.
Nothing is stored
What you paste is used for your answer and then dropped. No account, no tracking of your content.
AI only where it helps
Checks and parsing run in code. AI writes the plain-English part, and every tool says how it uses it.
Guides that go with the tools
When a tool finds the problem, these articles walk you through the fix.
About Dinesh
Dinesh is an IT infrastructure specialist with more than 20 years of industry experience in email systems, Exchange Server and Microsoft 365 (Office 365). He is the founder of several tech blogs, including MailboxInsights.com, where he writes practical guides based on real work.