Envelope
by mortuusars
Envelope adds a mail system to Minecraft, with mailboxes, pigeons that carry letters and packages between players, and a payment option for trades.
What it does
Players write letters and packages, then address them through a mailbox using an Address Selection screen that lists the addresses available to them. Mailboxes connect to a mail network for a cost of 3 experience levels, and each mailbox stores the mail it receives. Mail is sent from the front hatch of a mailbox, where nearby pigeons pick it up and carry it across the world. Pigeons are friendly creatures that gather seeds, and they are found in mountain areas near villages, where they rest in small cozy houses.
The mod also covers trade. Items can be sent through a Mail Service, where the buyer receives the goods in a Payback Box and pays before the mail is released. Mail stays in storage until the buyer pays, and if the buyer does not pay in time, the mail returns to the sender. Virtual addresses can receive mail and perform actions. Envelope runs on client and server, so the server and every player need it, and it requires Fabric API and Forge Config API Port. It is released for Fabric and NeoForge for 1.21.1 and is open source under the GNU General Public License v3.0 only.
Key features
Pigeon delivery
Pigeons carry mail from a mailbox to other mailboxes across the world, and players can follow them.
Mailbox network
Mailboxes store received mail and join a connected network for a cost of 3 experience levels.
Address selection
A single item opens a screen that lists the addresses available for sending mail.
Safe item trade
Payback Boxes and the Mail Service hold goods until the buyer pays, and unpaid mail goes back to the sender.
Rare mob carriers
Hostile mobs in the Nether can spawn carrying a package, and a 1 in 5 chance applies to each spawn.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
Use cases
Who it’s for: Survival and roleplay servers where players want letters, parcels and item sales between players, with a server that runs both Fabric and NeoForge.
How it compares
Ender Mail Reborn is for Fabric and NeoForge on 1.21.1, with the same client and server environment, but it is licensed under Creative Commons Attribution Non Commercial Share Alike 4.0 and is not open source. You've got mail is NeoForge only, covers 1.21.1 – 1.21.11, and is licensed under the Apache License 2.0. Envelope differs from both in its GNU General Public License v3.0 only license and its Fabric and NeoForge support on 1.21.1.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Envelope | Fabric and NeoForge | 1.21.1 | Client and server | 2026-08-15 |
| Ender Mail Reborn | Fabric and NeoForge | 1.21.1 | Client and server | 2026-07-17 |
| You've got mail | NeoForge | 1.21.1 – 1.21.11 | Client and server | 2026-07-30 |
Questions
Does Envelope need Fabric API?
Does Envelope have to be installed on both sides?
Which game versions does Envelope support?
In the catalog
Envelope is one of 4,058 Storage mods on ModsFinder, and one of 2,474 Storage mods for Fabric. 32,366 mods support Minecraft 1.21.1.
More from mortuusars
Similar mods
What the author says
Friendly creature, that can be found in mountain areas or near a village A cozy house for pigeons to rest inside of, and leave their, ehm... “byproducts”
Official listing
- Modrinth page
- modrinth.com/mod/envelope
- Owner
- mortuusars
- Published
- 2025-06-09
- Updated on Modrinth
- 2026-08-15
- Facts verified
- 2026-10-15