How to find email headers

Introduction

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.

Procedure

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 for Windows

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

Gmail

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

Yahoo! Mail

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

Outlook.com, 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