Z 2 z 5 gwězdkow pógódnośony

wót breg dnja Maj 16, 2010 · trajny wótkaz

Neither "identity delect+" nor "identity chooser" is a solution for current TBs to achieve this function.
What does the job is "Folder account":
https://addons.mozilla.org/en-US/thunderbird/addon/2874/