The headers of a message provide detailed information on the routing of a message and are an immense help in troubleshooting email-related issues. Because they contain more information than most would need or want, they are usually available but hidden.

Here is how to find email headers in some of the most popular email clients:

THUNDERBIRD
In the email -> Go to top-right corner, Click the "more" dropdown -> Select View Source

APPLE MAIL
Highlight the message -> Go to View at the very top -> Message -> All Headers

OUTLOOK (WINDOWS)
Double-click the message so it opens in its own window >> Go to File->Properties >> Headers are displayed in properties box near the bottom

GMAIL
From the message, go to the upper right-hand side >> Click the 3 dots >> Select Show Original

YAHOO!
From email message >> Top center next to "Spam", Click 3 dots >> Click View Raw Message

OUTLOOK.LIVE.COM/HOTMAIL
Click Message >> In message screen go to top right-hand side >> Click the dropdown >> Select View message source


HORDE
Highlight email message >> Mid Screen Click + symbol >> View Source

ROUNDCUBE
Highlight email message >> Click the 3 dots with "More" underneath>> Click Show Source
 

 

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