When you get this type of message it indicates that you are getting close to your mailbox quota. To reduce your mailbox size, delete old mail items and empty your deleted items folder. Remember ITS will never ask for your username and password. If you receive an email requesting such information delete it and report it to the ITS help desk.
Your mailbox is almost full.
Current sizeMaximum size
Please reduce your mailbox size. Delete any items you don't need from your mailbox and empty your Deleted Items folder.
Sent by Microsoft Exchange Server 2007