[Feature] Ability for players to send 'email' books.

[NicoNekoDev]

For this feature:

• players can send emails to each other
• players can send mass emails
• a 'changelog' for the server sent as an email.
• players can see what emails they have
• players can remove or keep the emails

[NicoNekoDev]

#9 Use database to save emails.

[PikaMug]

Has this been done already? Interesting idea, but I think you'd be better off overriding the /mail feature of EssentialsX (which nearly every server has installed) to display as a book instead of in chat.

[NicoNekoDev]

So, after I've took a look at book edit serverbound packets, it might be possible to add this. I will try to test those today.