Changes

'''Folder and Message Lists - folders-message-lists@thunderbird.bugs'''

The list of folders and/or the list of messages in the 3-pane window

'''General - general@thunderbird.bugs'''

'''Message Reader UI - message-reader@thunderbird.bugs'''

The area that displays the header and body of the message, either in the 3-pane window or the standalone message window.

'''Migration - migration@thunderbird.bugs'''

'''Toolbars and Tabs - toolbars-tabs@security.bugs'''

Toolbars and tabs in either the 3-pane window or the standalone message window

=== [https://bugzilla.mozilla.org/describecomponents.cgi?product=Mailnews%20Core Mailnews Core Components] - Default QA Contact ===