Every guild has members who have questions that need to be addressed by guild admins, but which one to contact? Why not contact them all?
This suggestion by
Protagonist and I will help solve that issue.
This screenshot demonstrates what it would look like in the administrative box, as well as a sample of what the inbox would look like.

Who would be able to access this would be controlled in the "edit ranks" page - once a PM has been read and responded to, it will show just as it does in a regular inbox
Now as default, it would most likely be a purchaseable feature - admins may select settings (Who may PM) and it would abide by the same rules as regular PM box.
As an additional feature, extra space MAY be purchased, but this part is not up to me.
Thanks for your time!
E/ Another very useful feature for this is guild applications - it would save having a topic dedicated to guild recruitment, as users would be able to PM it to the guild inbox
This post was edited by Sire on Jul 1 2012 01:55pm