Post Office Guide - IdleOn

Aleph

April 14, 2025

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The Post Office can be found in World 2 town Yum-Yum Desert and each day it gives you a set of item tasks to complete in return for points you can spend on character upgrade crates.

• How To Unlock the Post Office
• Post Office Tasks
• Post Office Upgrades
• Post Office Bonuses

To access the Post Office, you must first complete the pre-quest by talking to the Post Office NPC.

How To Unlock the Post Office

To use the Post Office, click on the Post Office NPC in Yum-Yum Desert and accept the quest Signed, Sealed and Lost In The Post.

To complete this quest you'll need to craft 5 Empty Box items from Anvil Tab II.

This item can be crafted at The Anvil with the following materials:

Item	Materials	LevelReq	EXP
Empty Box	Hermit Can x250 Megalodon Tooth x400 Distilled Water x4	Lvl 18	1,500 EXP

Hermit Can comes from Fishing.

Megalodon Tooth drops from Mimic.

Distilled Water comes from Alchemy.

Once you complete the quest, you'll unlock the Post Office!

Post Office Tasks

There are a total of 6 Post Office companies you can do tasks for each day. You'll have to complete a certain number of Post Office Tasks in order to unlock the companies on the second tab.

The quantity of each item asked for has a base value, which is increased based on a player's post office streak.

For each task you complete you are given some items, but most importantly Post Office Box Points that you can spend on upgrades for your character.

Company	Items Asked For	Possible Rewards	Unlocked
Simple Shippin	Copper Ore x150 Iron Ore x150 Copper Bar x50 Oak Logs x200 Bleach Logs x100 Jungle Logs x80 Goldfish x120 Fly x120 Hermit Can x100 Butterfly x100 Iron Bar x50 Thread x100 Trusty Nails x40 Gold Ore x100 Gold Bar x25 Potty Rolls x125 Jellyfish x70 Sentient Cereal x90 Boring Brick x25 Tropilogs x110 Bloach x40 Veiny Logs x100 Fruitfly x65	Armor Upgrade Stone I x2 Weapon Upgrade Stone I x1 Tool Upgrade Stone I x2 Golden Jam x1 Peanut x50 Power Statue x1 Small Experience Balloon x1 Feasty Statue x1 Forest Villa Key x1 Efaunt's Tomb Key x1 Helmet Upgrade Stone I x1 Gem x1	Default
Plan-It Express	Farmer Brim x1 Wooden Spear x1 Flip Flops x1 Copper Boots x1 Iron Boots x1 Leather Cap x1 Copper Platebody x1 Top Hat x1 Blue Tee x1 Birch Longbow x1 Iron Pickaxe x1 Iron Helmet x1 Gold Helmet x1 Bandage Wraps x1 Starlight x1 Royal Bayonet x1 Iron Hatchet x1 Green Tee x1 Gold Boots x1 Copper Band x1 Carrot Launcher x1 Black Tee x1 Spiked Menace x1 Gold Fishing Rod x1 Golden Net x1 Pharaoh Bow x1 Plat Fishing Rod x1 Platinum Shins x1 Plat Hatchet x1 Platinum Pickaxe x1 Platinum Boots x1	Armor Upgrade Stone I x2 Weapon Upgrade Stone I x2 Golden Nomwich x1 Average Speed Potion x100 Small Experience Balloon x1 Feasty Statue x1 Armor Upgrade Stone II x1 Tool Upgrade Stone II x1 Kachow Statue x1 Forest Villa Key x1 Helmet Upgrade Stone I x1 Small EXP Potion x100 Efaunt's Tomb Key x1 Weapon Upgrade Stone II x1 Gem x1	Default
Dudes Next Door	Spore Cap x125 Frog Leg x120 Bean Slices x115 Slime Sludge x110 Snake Skin x105 Carrot Cube x100 Glublin Ear x100 Plank x90 Bullfrog Horn x90 Pocket Sand x100 Corn Kernels x100 Megalodon Tooth x95 Stick x80 Crabby Cakey x150 Rats Tail x100 Acorn x70 Amarok Slab x2 Coconotnotto x100 Furled Flag x100 Pincer Arm x80 Potato Remains x80 High Steaks x80 Wakka Cherry x80 Singlecle x80 Shrapshell x80 Ripped Tunic x2	Armor Upgrade Stone I x2 Weapon Upgrade Stone I x2 Golden Kebabs x1 Average EXP Potion x100 Radioactive Waste x20 Small Experience Balloon x1 Armor Upgrade Stone II x1 Tool Upgrade Stone II x1 Weapon Upgrade Stone II x1 Efaunt's Tomb Key x1 Armor Upgrade Stone II x2 Tool Upgrade Stone II x2 Weapon Upgrade Stone III x1 Gem x2	Default
Down Undelivery	Nuget Cake x1 Glass Shard x1 Ghost x5 Woodular Circle x1 Golden Plop x1 Yellow Snowflake x1 Ice Age 3 x1 Black Lense x1	Armor Upgrade Stone II x2 Weapon Upgrade Stone II x2 Golden Ham x1 Decent Speed Potion x100 Radioactive Waste x30 Small Experience Balloon x1 Cauldron Statue x1 Beholder Statue x1 Armor Upgrade Stone II x1 Tool Upgrade Stone II x1 Bullseye Statue x1 Forest Villa Key x1 Helmet Upgrade Stone I x1 Average EXP Potion x100 Efaunt's Tomb Key x1 Weapon Upgrade Stone III x1 Gem x1	65
Alpine Suppliers	Floof Ploof x250 Melty Cube x230 Moustache Comb x220 Sticky Stick x210 Mamooth Tusk x200 Snow Ball x180 Pen x170 Cracked Glass x160 Sippy Straw x150 Cryosnake Skin x145 Audio Cord x140 Contact Lense x135 Ram Wool x100 Blood Bone x50	Armor Upgrade Stone I x2 Weapon Upgrade Stone I x2 Golden Bread x1 Decent Speed Potion x100 Radioactive Waste x50 Small Experience Balloon x1 EhExPee Statue x1 Radioactive Waste x100 Nuget Cake x1 Woodular Circle x1 Golden Plop x1 Armor Upgrade Stone III x1 Tool Upgrade Stone III x1 Seesaw Statue x1 Efaunt's Tomb Key x1 Helmet Upgrade Stone I x1 Average EXP Potion x100 Chizoar's Cavern Key x1 Weapon Upgrade Stone III x1 Warped Helmet Upgrade Stone x1 Gem x1	140
Cosmic Carrier	Purple Mush Cap x500 Half Eaten Donut x500 Lost Batteries x1 Alien Hive Chunk x300 Skelefish x250 Bottle Cap x1000 Worker Bee x300 Tongue Bone x300 Crumpled Wrapper x300 Lustre Ore x300 Empty Oyster Shell x300 Cubed Logs x300 Pearler Shell x1 Condensed Zap x300 Starfire Ore x100 Fairy x300	Armor Upgrade Stone IV x3 Weapon Upgrade Stone IV x2 Tool Upgrade Stone IV x2 Golden Ribs x1 Cooking Ladle x3 Medium Experience Balloon x1 Colosseum Ticket x1 Armor Upgrade Stone C x1 Weapon Upgrade Stone C x1	325

Post Office Streaks

You can also earn bonus Post Office Box Points (in addition to your guaranteed 1 point) based on your streak.

Your streak ends if you fail to complete a task in time of the next Post Office Daily Reset.

Post Office Upgrades

You can spend your Post Office Box Points on Upgrade Crates for your characters.

The points you earn are shared between all your characters, but each character can have their own individual upgrades assigned.

Each upgrade crate has three stat bonuses that are unlocked as you add points into them:

• First - Default
• Second - 25 Points
• Third - 100 Points

Bob's Boxes Upgrade Crates

These upgrade crates are available by default as soon as you unlock the Post Office.

Crate	Stat 1	Stat 2	Stat 3
Civil War Memory Box	Base Damage	% Fight AFK Gains	% Critical Chance
Locally Sourced Organs	Base Max HP	% Max HP	% Faster Respawns
Magician Starterpack	Base Max MP	% Max MP	% Faster Cooldowns
Box Of Unwanted Stats	Base Accuracy	Base Defence	% Monster EXP
Dwarven Supplies	% Mining Efficiency	% Prowess Effect	% Mining AFK Gain
Blacksmith Box	% Smithing EXP	% Production Speed	% to Craft +1 Slot
Taped Up Timber	% Choppin Efficiency	% Prowess Effect	% Choppin AFK Gain
Carepack From Mum	% Not Consume Food	% Health Food Effect	% Boost Food Effect
Sealed Fishheads	% Fishin Efficiency	% Prowess Effect	% Fishin AFK Gain
Potion Package	% Brewing Speed	% Alchemy EXP	Cranium Cook Time
Bug Hunting Supplies	% Catchin Efficiency	% Prowess Effect	% Catchin AFK Gain
Non Predatory Loot Box	% Drop Rarity	LUK	% Crystal Mob Spawn

Charlie's Crates

These upgrade crates become available once you have unlocked all 6 Post Office Company Slots.

Crate	Unlock	Stat 1	Stat 2	Stat 3
Deaths Storage Unit	Default	Weapon Power	% Basic Atk Speed	% Total Damage
Utilitarian Capsule	Default	% Printer Sample Size	% Multikill per Tier	% Cash from Mobs
Lazzzy Lootcrate	Default	% 2X AFK XP chance	% AFK exp if 36hr+	% AFK Cash if 36hr+
Science Spare Parts	Default	Lab Efficiency	% Lab EXP gain	Base LUK
Trapping Lockbox	Default	% Trapping Efficiency	% Trapping EXP	% Critters Trapped
Construction Container	Default	% Base Build Rate	% Shrine Charge Rate	% Construction EXP
Crate Of The Creator	Pet Arena Round 12	% Worship Efficiency	% Max Charge	Starting Worship Pts
Chefs Essentials	Pet Arena Round 25	Cooking Efficiency	% Cooking EXP gain	% for 2x Ladle Drop
Myriad Crate	Pet Arena Round 65	Base All Stat	Base All Efficiency	% All Skills exp
Scurvy C'arr'ate	Sailing Relic: Silver Ankh (Beachy Coast)	% afk counts for sailing	AGI	% Total Damage
Box Of Gosh	Sailing Relic: Billcye Tri (Stormy North)	% Divinity EXP	WIS	% Divinity Gain
Gaming Lootcrate	Sailing Relic: Cloud Urn (Cloudy Quay)	% afk counts for gaming	STR	% Total Damage

Post Office Bonuses

You can get more Post Office Bonuses in IdleOn using the following methods:

Name	Boost	From	Notes
Daily Mailbox	Get x Post Office boxes every day you open up IdleOn and play it!	The Upgrade Vault	Access from World 1
SLUG SLURP	+ Post Office Box Points for every character, and easily the best bonus in the game. A box will never abandon you!	Alchemy	Access from World 2
Post Office Box Reseto Magnifico	Resets all your post office upgrades, and refunds all boxes spent. This lets you choose different post office box upgrades! This item restocks each week.	Gem Shop	Access from World 1