Takes place (potentially) in the same continuity as Highfire's Great Big Mailventure.

Princess Luna is presumed dead. Her sister weeps. Her friends mourn. A nation searches.
This is not their story. Not entirely, anyways.
Instead, this is the story of what happens, when she returns.

Updates whenever I feel like I have something solid.

This is the story of one Green Highfire Lines, former oddjobber, now technically mailpony with lost and found characteristics.

Confused? So's he. But he has a bagfull of mail, some very high authority figures hanging over his shoulder, and the lovely hoof of responsibility carefully reminding his spinal collumn of his newfound obligations.

...at least he might get paid.

...r-right?

A tip, at least?

P-pretty please?

Starlight over Detrot is an excellent story.
I have a single quote though, that for some reason caught my eye.

It is said: “You steal the mail when it arrives, you steal the mail before it leaves, but nopony steals from a mail carrier’s bag.” There’s a record of an incident where a new mail carrier left her bag (presumably by accident, but this has never been verified) in a remote train station. To the best of anypony’s knowledge, it is still there, sheltered under a propped up umbrella, waiting for somepony with sufficient authority to pick it up. As trifling with the mail means trifling with the Royal Equestrian Mail Service, nopony has stepped up to take the risk.

...yeah it took like a few hours to start writing this whooooooo