This program is a daemon that keeps an eye on the mail log and watches for POP3 logins on the machine. For each successful POP3 login antispam keeps a record of the originating machine's IP and allows it to use the local mail relay. The deamon keeps two hash files where it stores the IPs of authorised machines. The first hashed is for internal use and stores the IPs and the time at which the login was made (for timeout purposes). The second hash is shared with sendmail (or whatever mailer is in use). The mailer must search this additional file for IPs that it should allow relaying to.
