Making other items tradable which is not(via mail)

Originally posted by [b]Jayzy[/b]
http://www.eathena.ws/board/index.php?autocom=bugtracker&showbug=3564

I just want to know why in db/item_trade.txt there is no function for mail system.

//Item Trading Restrictions File
//Specify here special rules for item trading.
//Item ID, TradeMask, GM-Level Override
//Trading mask values:
//1:Item can't be drop
//2:Item can't be traded (nor vended)
//4:Wedded partner can override restriction 2.
//8:Item can't be sold to npcs
//16:Item can't be placed in the cart
//32:Item can't be placed in the storage
//64:Item can't be placed in the guild storage
//Example:
//1161,67,50 //Balmung: No drop, No trade, No Guild Store (1+2+64 =67),
//only GMs of GM-level 50 and up can override the setting.

They are using that as a function for making non-tradable items into tradable items. Thank you for reading my report and hope there will be an action as soon as possible because it causes a major bug in trading items which are not tradable.