mailbox place on computer where e-mails are stored Richard explained that everyone on the E-mail network has an electronic mailbox to which letters can be `posted' .New messages can arrive at your mailbox while you are viewing the message list , you can use the Check button on the Messages dialog box to refresh your list while you are viewing it . The first instinct is to delete it , along with all the other junk mail that lands in the mailbox from cyberspace . The class also used the mailbox facility to ask for brochures which were sent to the school Then on your mailbox software set the filter to place all emails sent to your chosen address into one in-box folder . postbox (where people post letters) In New Jersey , federal agents retraced a postal route , searching for the mailbox in which someone may have deposited letters laced with anthrax . One woman says she's so accustomed to being on camera that she doesn't even go to the mailbox without wearing full makeup . letter box in a building or outside a house His name was taped on to the mailbox for flat number 5b .`` The worst part was seeing the postman pass my mailbox without stopping , '' Freeland wrote in her remembrance . There , among the bills in her mailbox on Saturday , was a letter and a check from Viking Lotto .