[Solareon]

crate an array of strings that is twice the amount of messages you wish to hold. (1 for from line and one for message) have the array be saved to a mailbox npc whichs reads the strings from the array in a sign like form (say2 I think but it may be just say)

rather easy. Then to make sure that a message isn't erased set up the message saving code to check the array for the first null array string. I think that would work but not positive if Graal has a null checking thing.