One WoW player was in for a surprise! The super-rare 
Reins of the Infinite Timereaver showed up in their mailbox after a dungeon run!
This mount ,which only drops in Timewalking dungeons, has an extremely low drop rate and is considered one of the rarest rewards from Timewalking. But for Adamka53, it arrived not from the loot window, but from The Postmaster!
In WoW, The Postmaster automatically sends uncollected loot to players if they forgot to loot a boss or their inventory is full.
This appears to be what happened here. The player likely finished a Timewalking dungeon, missed the drop, and moved on. Unaware that one of the rarest mounts had just dropped for them. Thankfully, The Postmaster stepped in!
