Using a master authentication file for access to all mailboxes with special master password. The name of the file is given as an argument when initializing the module (default: /etc/popular/masterauth.conf). This is a plain text file. Each line contains an IP number in dotted quad notation, a colon, a namespace name, another colon and a crypted password. If the IP number matches the IP number of the POP3 client, the namespace name matches the accessed namespace, and the password matches the given POP3 password, access is granted. Empty lines and lines beginning with a '#' symbol are ignored.
This feature is intended to be used by the postmaster or support staff. Connections authenticated with the master password are flagged. New mail read is not marked as read, so that the customers MUA will not get confused. Mail that is deleted, WILL REALLY BE DELETED.