Version:           1.99.0 (using KDE 4.7.4) 
OS:                Linux

Apparently the folder tree is arranged by alphabetical order but with some exceptions as some key folders like "sent-messages", "dust-bin", "models", drafts", "messages-to-be-sent" (translated from french) are on top in the layout ; one key folder "messages-received" though follows the alphabecical order. In my case there is no possibility to move it up ; could you please propose some features on any folder like :
- reorganize in aphabetical order,
- move-up,
- move-down,
- lock,
- etc...
and authorize "drag and drop" to position a folder whertever the user desires within its "children".

For the time being there is a "drag and drop" option showing a horizontal line where with "move here" or "copy here" possibilities that do not work at all but that would at least fulfill parts of desired features listed above.
 

Reproducible: Always

Steps to Reproduce:
try to move a folder in layout

Actual Results:  
no way ; present layout is a combination of alphabetical order and exceptions for SOME key folders

Expected Results:  
To tal freedom to position folder wherever desired

OS: Linux (x86_64) release 3.0.0-15-generic
Compiler: gcc