text_combined: warning mailbox approaching size limit warning sent automatically inform mailbox approaching maximum size limit mailbox size currently 93241 kb mailbox size limits mailbox reaches 75000 kb receive message check size mailbox right click mailbox outlook today select properties click folder size button method used individual folders well make space available delete items longer needed sent items journal entries must empty deleted items folder deleting items space freed turn journaling click tools options journaling options de select items see client help information