Do mailbox messages expire?
Last Updated: 180d
The following expire after 5 days:
-Guild coins that you are awarded when someone in the guild makes a purchase
The following expire after 7 days:
-Invasion Guild Gifts, if claimed when there is no active invasion. Be sure to claim them during an invasion!
Other mailbox messages do not currently expire.
Any mailbox message older than 30 days will be auto-collected and the items delivered to your inventory.