The mail debacle isn't the only strange thing coming out of today's maintenance. PvP armor, both honor gear and arena gear, have had their prices all screwed up.
- Select Season 4 weapons have had their rating requirements removed.
- Select Season 2 weapons have found themselves bearing rating requirements they didn't previously have.
- Warlocks and Priests can purchase full sets of Season 2 gear at absolutely no cost whatsoever.
- Select Season 4 accessories can be acquired at no cost.
- The Brutal Gladiator's Hatchet is completely free as well.
Those are only the things we know of right now, the problem may even go farther than that. I've checked the Tiers 4, 5 and 6 vendors with a few friends of various classes and haven't run into any oddities there yet. It seems exclusive to PvP gear.