How to get raw headers or full message source

Gmail or Google Workspace

• Open the message in Gmail in a browser.Use desktop webmail, not the mobile app.
• Open the More menu next to Reply.Choose Show original.
• Copy the source.Use the built-in copy action, then paste it into the tool.

Outlook.com, Outlook on the web, or new Outlook

• Open the message window.Use Outlook.com or Outlook on the web in a browser, or new Outlook on desktop.
• Open More actions.Select View and then View message details.
• Copy the headers.Paste the message details into the analyzer.

Classic Outlook for Windows

• Open the email in its own window.Do not stay only in the preview pane.
• Open message properties.Go to File and then Properties.
• Copy Internet headers.Paste the header block into the analyzer.

Mail on Mac

• Open Apple Mail on macOS.Select the original message.
• Show detailed headers.Choose View then Message then All Headers.
• Copy the visible header block.Paste it into Email Inspector or Phishing Check.

Mail on iCloud.com

• Open iCloud Mail in a browser.Select the message you want to inspect.
• Open the More menu.Choose Show All Headers.
• Copy the expanded headers.Paste them directly into the analyzer.

Yahoo Mail

• Open the message in Yahoo Mail.Use the full web interface.
• Open More options.Select View Raw Message.
• Copy the raw output.Paste the full header or source into the analyzer.

AOL Mail

• Open the message in AOL Mail.Use the web interface for the original mailbox.
• Open More.Select View Raw Message.
• Copy the raw message.Paste it directly into the analyzer.

Proton Mail on the web

• Open the message at mail.proton.me.Use the original message, not a forwarded copy.
• Open the three-dot menu.Select View headers.
• Download or copy the result.Proton exposes the headers directly in a pop-up.

Proton Mail on iPhone or iPad

• Open the original message in the Proton Mail app.This is one of the few mobile clients that documents header access directly.
• Open the three-dot menu.Select View Headers.
• Share or copy the output.Then paste it into the analyzer.

Android or iPhone Gmail app

Google's header-copy instructions are documented for Gmail in a browser. If you only have the Gmail mobile app, open the same mailbox in desktop web Gmail and use Show original.

Outlook for iOS or Android

Microsoft documents message-header access for Outlook.com, Outlook on the web, new Outlook, and classic Outlook for Windows. If you are on the mobile app, switch to Outlook on the web or desktop Outlook to copy the real headers.

iPhone or iPad Mail app

Apple documents detailed headers in Mail on Mac and on iCloud.com, not as a simple raw-header export flow in the native iPhone or iPad Mail app. For reliable evidence, open the same message in Mail on Mac or iCloud Mail on the web.

Proton Mail on Android

Proton's current Android app documentation says viewing message headers is not yet available in the latest version. If you need raw headers, use Proton Mail on the web instead of forwarding the message out of the app.

Samsung Mail or other Android mail apps

Android mail clients vary by vendor. If you do not see a direct View source, Show original, or View headers action in the message menu, use the provider's webmail or desktop client instead of pasting a forwarded copy.