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How to View Full Message Headers in Mozilla Thunderbird

Checking out headers can help you troubleshoot email problems

By Heinz Tschabitscher Heinz Tschabitscher Writer University of Vienna A former freelance contributor who has reviewed hundreds of email programs and services since 1997. lifewire's editorial guidelines Updated on July 2, 2022 Tweet Share Email Tweet Share Email Email Yahoo! Mail Gmail

What to Know

Open Thunderbird and select a message in the reading pane to open it in a new tab or window.Select View > Headers > All to display the full message headers. Select View > Headers > Normal to revert.Select View > Message Source to see or copy the header lines in their original unformatted state. This article explains how to reveal headers that are normally hidden in emails in Mozilla Thunderbird. The header can help you troubleshoot email problems.

How to View Hidden Mozilla Email Header Data

All emails consist of two parts: the header and the body. The standard header—which is the part you normally see—typically lists the sender and recipient of the message, date, and subject. Behind the scenes, though, the header contains much more information, such as the path it took from sender to recipient, the sender's IP address, and the message's priority. This information isn't particularly easy to interpret and isn't usually of interest to the recipient, so it's hidden. When you're asked to pass along all message headers to thwart a spammer or troubleshoot an email problem, or if you're simply curious, you can reveal all the hidden info. Open Thunderbird. Select a message in the reading pane to open it in a new tab or window. Select View > Headers > All from the menu bar to display the full message headers. To return to the standard set of headers, select View > Headers > Normal from the menu.

Viewing a Message' s Source

If you want to see or need to copy the header lines in their original unformatted state, open the message's source in Mozilla Thunderbird by selecting View > Message Source. The source code is more extensive than just headers and includes the coding for the entire email. Was this page helpful? Thanks for letting us know! Get the Latest Tech News Delivered Every Day Subscribe Tell us why! Other Not enough details Hard to understand Submit More from Lifewire How to View the Source of a Message in Mozilla Thunderbird How to Access an Email Message Source in Outlook.com A Guide to Viewing Full Email Headers in Gmail How to View the Source of a Message in Gmail How to See Full Message Headers in iCloud Mail How to Load Images in a Message in Evolution How to See Full Email Headers in Outlook.com Learn How to Properly Redirect an Email in Outlook How to Forward an Email as an Attachment in Outlook How to View the Complete Email Message Source in Outlook Differences Between the Email Body and the Header How to View the Source of a Message in Apple Mail How to Find the IP Address of an Email Sender How to Get Mozilla Thunderbird Plain Text Email Display How to Show Email Headers in Windows Mail and Outlook How to Export Contacts in Mozilla Thunderbird Newsletter Sign Up Newsletter Sign Up Newsletter Sign Up Newsletter Sign Up Newsletter Sign Up By clicking “Accept All Cookies”, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Cookies Settings Accept All Cookies