Alt+X > Mailbox (Info square, 5th option of the left column). Or simply click the icon on the bottom-left side of the screen. Sealed items like weapons/armor/jewels and some P2W items such as Pendant, talismans and brooches (stones) are NOT tradable.
Not only that... Even on same account you can't move Coupons for weapons and weapons got from coupon. Which completely brakes the game. Your main has B-A grade weapon. You craft golden box from which u get weapon C coupon which is not tradable... You chose items in dimension merchants from coupon on tab Tradable. But they are not. 3x ive got coupons. Wanted to get bow for my archer char on same account. Sorry WE CAN SHARE D GR MOON ARMOR. BUT NO WEAPON OR COUPONS lol.
