Someone ask me for a program that can read standard Unix or Linux mail files and delete the mail that is too old. It is a problem that we find on the big networks (universities, big enterprises, etc) where often users consult their mail in telnet and don't erase it of the server or doesn't consult it at all. These files of mail become enormous and take a lot of space in the spool. This soft will works only on Unix systems with standard Perl and sh.