Review for Stop Ignoring Reply:To by Sechstein
Rated 5 out of 5 stars
For advanced users: https://www.mozilla.org/en-US/thunderbird/52.4.0/releasenotes/
Preferences > Advanced > General > Config Editor: set "mail.override_list_reply_to" to "false".
To create your own collections, you must have a Mozilla Add-ons account.