Expiring mail warning and mail Ping-Pong
Expiring mail warning:
An overwiev window for mail send and recieved on all characters (simillar to the ledger tab) and some kind of warning if mail is about to expire on an alt.
Option to mark certain mail for in Mailbox storage.
Once marked these mails will be send to a specified alt by the press of a button. If they return they will be once again send back to the storage alt at button press.