To allow users to set outbox easily or not?

[Pawel Salek <pawsa theochem kth se>]

Hi,

I have a question to all the users here: should an option be added to  
mark a mailbox as outbox or not?

Currently, it is not possible but there is a pending patch for it[1]. The  
argument is to add such a function to restore symmetry: one can mark a  
mailbox as senbox, draftbox, trash so why not to mark it as outbox?

I have some doubts here though: setting another mailbox as inbox or  
senbox, or event draftbox is harmless. Setting mailbox as trash may be  
harmful if you subsequently ask to empty the trash - but it cannot be  
considered an unexpected behavior. Setting a mailbox as outbox may have  
more far-reaching consequences: on next mail sending, entire mailbox will  
be sent to the To: address and all messages - removed. This is why I  
hesitated to commit that patch since in my opinion, it violates the  
"principle of least suprise". Still, experienced user will still be able  
to change that option if needed. Opinions?

Pawel
[1] http://bugzilla.gnome.org/show_bug.cgi?id=110931