[1.20.1] Mighty Mail lets me still send Items through the Postbox, even though they are banned.

[rraku]

Describe the bug
The Mighty Mail standalone mod is letting me send Items through the Postbox, even though i declared them as banned in the Config.

To Reproduce

1. Go to the Mighty Mail mod config in the config folder.
2. Click on the config and open it.
3. Declare items that are banned in the config.
4. Save the config and open Minecraft
5. In Creative as well as Survival Mode try to send one of the declared items through the Post Box.
6. Watch as the Item gets send and get frustrated xD

Screenshots

Please complete the following information:

• Minecraft Version: 1.20.1
• Mod Version: 1.0.14