Email header export
iPhone and iPad
No reliable raw-header export has been confirmed in the native Apple Mail app. Open the same mailbox in its provider’s webmail and use the options below. If the mobile view hides them, try Request Desktop Website in Safari; availability varies. A desktop browser remains the fallback.
Already have an original .eml file in Files? Select it using the tool’s file picker. A normal forward, screenshot or printed PDF does not supply the original transport headers.
iCloud Mail
Open the message at iCloud.com/mail. Use the message’s More menu and select Show All Headers. Copy the headers into the tool.
Gmail
In Gmail in a browser, open the message, select More beside Reply, then Show original. Copy the original into the tool or download it as .eml.
Outlook and Microsoft 365
In Outlook on the web, open the message and select More actions, View, View message details. Copy the complete header text. In classic Outlook for Windows, open the message in its own window, then File, Properties, Internet headers.
Mail on Mac
Open the original message. Select View, Message, Raw Source and copy the source into the tool.
Import
Paste headers or drop an .eml or .txt file into the headers field. Maximum 2 MB. Outlook .msg files require conversion to .eml or copying Internet headers.
Header analysis runs in your browser. DNS lookups send the selected names and IP addresses to the resolver.