Mail sent from friend had no attachment

As title states, my friend named Yacm on server mailed me some currency in game but the attachment didn’t have the currency nor did he receive the currency back, where did it go? He sent 1855 gold but no attachment with currency.
Server: Azena-US East
my Character name: Imodium

Mabe it was flagged as a goldseller transaction?

Why can you still keep the old mails? All my friends mail deletes itself after open it. Even without taking the atachment