Add-ons
Filter SubFolders 1.0 Requires Restart
by Craig Miskell
Applies mail filters to sub folders of an IMAP account, not just the Inbox
![[Warning]](https://addons.thunderbird.net/static/img/developers/test-warning.png?b=b00ed3ed-652d8172)
Permissions
About this Add-on
This extension will apply your mail filters to any (and potentially all) sub folders of an IMAP account, not just the Inbox. This is useful for shared mailbox situations where server side filtering is in place to send mail to various sub folders, but you want to apply filters that update "read" state, cause specific notifications, or other client-side and client-specific actions.
It is possible to control which folders it will apply the filters to, with a simple inheritance scheme accessible through a new tab in the folder properties.
It is also possible to manually initiate a run of your mail filters across all your folders (respecting the configuration you have made which might stop them being applied to certain folders).
UPDATE: It turns out that there's already functionality to do filtering on sub
folders in Thunderbird, it's just not well documented. It can be enabled by setting the preference "mail.server.default.applyIncomingFilters" to true, or can be applied per folder by setting the "applyIncomingFilters" property to a folder. FilterQuilla (https://addons.mozilla.org/en-us/thunderbird/addon/filtaquilla/) is reported to be able to set that property, although I haven't tested it.
As such, I don't see any need to develop this extension any further; this is it kiddies.
It is possible to control which folders it will apply the filters to, with a simple inheritance scheme accessible through a new tab in the folder properties.
It is also possible to manually initiate a run of your mail filters across all your folders (respecting the configuration you have made which might stop them being applied to certain folders).
UPDATE: It turns out that there's already functionality to do filtering on sub
folders in Thunderbird, it's just not well documented. It can be enabled by setting the preference "mail.server.default.applyIncomingFilters" to true, or can be applied per folder by setting the "applyIncomingFilters" property to a folder. FilterQuilla (https://addons.mozilla.org/en-us/thunderbird/addon/filtaquilla/) is reported to be able to set that property, although I haven't tested it.
As such, I don't see any need to develop this extension any further; this is it kiddies.
