Mailing Gear
That sounds like a bug. Did you try relogging or even restarting the game? If it’s a tradeable item you should be able to drag it to the mail slot. I find that many ills in the game are cured by a reboot.
Maybe you can test to see if it’s postable on the TP (not actually posting it, as you want to give it to your friend). If not, it may not be something you can trade, though I am scratching my head given you have said it isn’t soulbound.
If relogging didn’t work, you wouldn’t happen to be trying to mail it directly from the bank would you? You have to mail from your inventory.
Tried many times after shutting down and finishing for the day.
Yes am logging from my invoice. Buggered if I know what the problem is !!