The Elder Scrolls Online v6.3.9 fixes a few UI and mail related issues, along with your character not being properly dismounted when navigating the Outfit Style menu. The size of this patch is approximately 77MB.
Going into an Outfit Style menu while mounted will now fully dismount your character.
Fixed an issue where mail wasn’t appearing even though you had a new mail notification.
Fixed a UI error that would occur when opening expired mail after it had been previously viewed.
Fixed a UI error that could occur when starting an ESO Plus free trial.