[geeklog-users] Threaded digests?

[geeklog-users-admin]

I'm new to blogging software and was looking at them to possibly 
provide a threaded email (I know that this isn't the primary purpose, 
but if it provided that at the right price). I'm subscribed to the 
group and don't see threading, so assume not possible with Geeklog?

It appears that the web pages can have threaded comments, but this 
apply or can it be applied to the emails? Thanks.