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Mail.dat®
Mail.dat is known as an industry standard database file set that consists of detailed presort mailing information based on specifications set by the International Digital Enterprise Alliance (IDEAlliance®). It is a group of files that combines information from a number of sub-files to provide a detailed summary and description of a presorted mailing. Mail.dat is created during the presort process, either by presort software processing name-and-address lists or by MLOCR (multiple line optical character reader) machines. No matter how the sortation is performed, the details that make up the mailing are recorded in the Mail.dat file set for that job.