NAME
youbind - Server of youbin service
SYNOPSIS
youbind [ -d ] [ -h ] [ -t ] [ -A port ]
DESCRIPTION
youbind is a server of the youbin protocol which is a derivation of "biff" protocol suitable for Network age. It has upward compatibility to "biff". youbind accepts the client request to observe the mail spool of the user specified. When youbind detects the change of the mail spool, it will notify the client so. youbin communicates with clients periodically to maintain the connection. It detects writing in the spool by receiving the "biff" packet from /bin/mail. It detects reading from the spool by polling mechanism. However, this polling period is quite long to lighten the load of the server. Therefore, it is requested to be informed to the server that the mail have read from the spool. Modified version of POP is provided to inform youbind when reading mails, since youbin protocol is considered to work with POP. mh-inc-hook for this is also provided for the user of mh-e of emacs.
OPTIONS
- -d
-
Various debugging information will be output with this option. This information includes log of communication with clients, registration and removal of clients, status changes of clients.
- -h
-
Simple explanation of youbind will be output.
- -t
-
Log the information of beginning and end of service.
- -A port
-
youbind will receive the packet from the specified port besides the "biff" port. This option is for the machine which uses ports except the "biff" port to inform of the arrival of mail. At this time, only MIPS's RISC/os uses the different port named "mbiff".
FILES
/usr/spool/mail Mail spool directory
SEE ALSO
BUGS
The number of the registered user is limited to 256. The number of mail clients is limited to 1024.
AUTHORS
Kiyoshi Agusa [email protected]
Shinichirou Yamamoto [email protected]