Hello !

I only tried on singleplayer for a few tests, but the names of the mailboxes disappear after a world restart.

basically, just place down a mailbox, give it a name, leave the world and join back, and the name will disappear.

I am guessing the behavior is the same on a server restart (as that can happen frequently to free some ram), I'm gonna try later today.

What version are you using?

Just to clarify, you are pressing "Accept" when you name your mailbox?

I'm using the last version available on curseforge, on minecraft 1.19.2

And what version is that?

mod version 1.0.13, and yes I am pressing "Accept" when I name my mailbox, I can record it for you if needed

I recorded the behavior, it should be available on https://youtu.be/Z3l1fZth2c0

I've located the issue. It was due to the character : being present in the file name, which is an illegal character for file names. What is strange is that I didn't run into the problem, even with all the restarts and tests I've done. I'll have a patch out soon.

Fixed in 1.0.14