"Have a great day!" Pinkie Pie called after her customer. Her giddy waiving and grin continued well passed been placed as fair and friendly and casually crept into creepy central. It didn't matter to the peppy pink party pony. Pinkie Pie was positively, pleasantly pleased. Suddenly she spied something, a flip-flapping and fluttering of feathers. A mail mare of moderately molted make, definitely Derpy, descended daintily. The pallier pony perfectly perched, big brown bag on her back, shook a shod shoe, then thumped through the threshold.

Pinkie's frantic flailing faultered when she spied the shopper. "Salutarins!" She stuttered. "Shoot! Sorry, I mean, 'sup?"

The Pegasus pony plunked her in way and plopped down a package; a lump of lovely letters lost in loose loops of lace. Pinkie Pie scrutinized the sight.

"Hey there Pinkie Pie!" The merry mail mare made a motioned to other occupant. "I've got some letters for you!"

Pinkie giggled. "I can see that, silly, but that isn't an alliteration."

"Alliteration, huh, what happened to your rhyming?"

The party pony, pressed by the proposition, was parlayed. "Zecoura..." She sighed. "Somehow she rhymed 'purple' and 'orange' in the same sentence. How can I compete with that?!"

"Ooh, that doesn't sound very good, and I'd love to hear all about it, but" The mail pony made a motion to her satchel. "I've still got a bunch more deliveries to drop off before picking Dinkie up from school. So, I'll see ya later!" Then Derpy dashed out the door, disappearing.

---edit line---

Pinkie eyed the loops of the lace-bound letters. She had never, ever had a such a peculiar pile . Obviously they should be opened. She poked hoof at sealing wax which closed a piece of parchment.

"Misses Cake, I'm going on break, could you please take over?" Pinkie called. Before the faint reply to the affirmative lofted from the mare in the back kitchen, Pinkie had the letters in her mouth and clambered up the stairs to her room and had shut the door.

Tentatively trotting past a lazily lounging Lucky and tossed the clutch of letters onto her bed. She hoofed over and hopped up to flop on her back beside it. "Hey Gummy, I got a lot of mail today! I wonder who sent it all?" She called to her miniature pet alligator who had been laying on her pillow. "There wasn't anything for you again, sorry." The reptile's only reply was the unsyncronised blink of its purple eyes.

Pinkie rolled to her side and curled around the letters. Carefully, the undid the loops to reveal the letters to pick to top piece of post.  It was parchment, folded into three, and sealed closed with a blob of red wax on one side. A poke of her hoof flipped it over to reveal the other side had her name and residence written in beautiful, flowing calligraphy. There was no reply address.

"Ooh, maybe it's an invitation to a party! Or an invite to host one! Wouldn't that be amazing?" Pinkie took a breath and blew on the letter, flipping it over. "Imagine all the happy, dancing ponies!" She clutched the letter between her fore-hooves and carefully broke the wax seal. "With my friends all there having fun!" Pinkie let out a giggle. "And smiling!"

She opened the letter her eyes darted about as she quickly skimmed the first few sentences, then stopped. She went back and carefully read the first sentence again. Then the next, much slower. Pinkie's smile seemed to secure its strength.

"Ohmygosh Lucky, the princess wants to meet you!"

The rest of the letters quickly forgotten.