To try the thousands of add-ons available here, download Mozilla Firefox, a fast, free way to surf the Web!
CloseWelcome to Firefox Add-ons.
Choose from thousands of extra features and styles to make Firefox your own.
CloseReview for Show Address Only by nyetwurk
Rated 4 out of 5 stars
Would be 5 stars .. all it needs is an option to display the envelope sender (aka "MAIL FROM" or "Return-Path:")
Unfortunately, it seems a trivially to fix bug in Thunderbird (no surprise nobody fixed it yet) prevents this from being possible.
https://bugzilla.mozilla.org/show_bug.cgi?id=494100
To create your own collections, you must have a Mozilla Add-ons account.