Private mailbox judgment method and device

The invention discloses a private mailbox judgment method and device. The private mailbox judgment method comprises the steps that an inbox, an outbox, the name of an addresser and the mobile phone number of the addresser are acquired; the inbox, the outbox and the name of the addresser are preprocessed; the class editing distance between the inbox prefix character and the outbox prefix characterand the class editing distance between the inbox prefix character and the addresser name extension character are calculated, and the number of bits where the inbox prefix character coincides with theaddresser mobile phone number is calculated; and a similarity ratio is calculated, whether the ratio is not less than a set value or not is judged, and if so, the inbox is regarded as the private mailbox of the current addresser. The embodiment of the invention provides a technical scheme. A technology for identifying a private mailbox when a mail is sent to the private mailbox is provided, the inbox is respectively compar