term% cat index.txt UPAS(8) System Manager's Manual UPAS(8)
NAME
upas - address driven mailer
SYNOPSIS
mail person ...
rmail -N network person ...
cmail -N network person ...
DESCRIPTION
Upas is a mail delivery system that disposes of messages in a way de‐
termined by the destination address and a set of rewriting rules. It
can be used to recognize many address formats and route remote mail to
different network mail interfaces.
mail is used by a user to send or read mail. See mail(1).
rmail is used to inject mail coming from other machines into the mail
system. No message conversion is performed.
cmail is used to inject mail formatted according to ARPA RFC 822 into
the mail system. The mail is converted into a form understand‐
able to upas.
Upas's rewriting rules (mail(7)) contain ed(1) style substitutions that
allow addresses to be transformed into the commands used to inject mail
to the networks.
The -N option causes the `network' indicates the name of the network
from which the message is coming. This network name is prepended to
the return address.
Each message submitted using rmail or cmail is checked against a for‐
warding list. Unless the name of all machines in the source path or
all machines in the destination path are in the forwarding list, the
message is refused.
FILES
/usr/lib/upas/rewrite the rewriting rules
/usr/lib/upas/forwardlist the forwarding list
/usr/lib/upas/forwardlist.lolocal forwarding list
/bin/mail the mailer program
/bin/rmail linked to /bin/mail
/bin/cmail linked to /bin/mail
/usr/spool/mail/* mailboxes
/etc/passwd authentication
/tmp/ma* temp file
/tmp/ml* lock file
$HOME/dead.letter unmailable text
SEE ALSO
xsend(1), write(1), uucp(1), mail(1), mail(7)
UPAS(8)