Add a new filter action that allows creating a child folder based on mail
header properties (such as sender's name / email address) within a specified
target folder. If the child folder already exists, move the email to it.
It may also be good to persist a new (move email to that folder) filter once
the folder has been created, because the expectation may be automatic filtering
to the new child folder even if the main / generic rule that created the
missing folder in the first place is removed (which may be likely once too many
false positives may have been moved or the inbox is reasonably tidied)
For some related discussion in Thunderbird itself, please refer:
Original bug from mozdev.org.
Add a new filter action that allows creating a child folder based on mail header properties (such as sender's name / email address) within a specified target folder. If the child folder already exists, move the email to it.
It may also be good to persist a new (move email to that folder) filter once the folder has been created, because the expectation may be automatic filtering to the new child folder even if the main / generic rule that created the missing folder in the first place is removed (which may be likely once too many false positives may have been moved or the inbox is reasonably tidied)
For some related discussion in Thunderbird itself, please refer:
https://bugzilla.mozilla.org/show_bug.cgi?id=308660
this one is about being able to create a new folder during defining a filter manually (and selecting in folder picker)