Apr 4th 2019 #1 No matter how much Zeni you attach, it will say that you attached 100,000,000 Zeni in the chat-log.Here is a gif as an example:https://i.gyazo.com/9617368ffbeef06b7e433738e386ab5d.mp4
Apr 4th 2019 #2 Hi,that is not a bug.It is an issue with the translation. It's supposed to say the amount of max zeni that can be attached to a mail.