i've rolled all the upas changes into a contrib package,
quanstro/nupas. unfortunately, it's not as clean an
installation as i would like. i'm sure there will be some
rough edges. problems reports and suggestions for cleaning
things up are welcome.
there is a few steps to prepare for this package.
; mv /sys/src/cmd/upas /sys/src/cmd/oupas
; mv /386/bin/upas /386/bin/oupas
; mkdir /386/bin/upas
once installed, you'll either (a) need to change /lib/profile
as follows. add the marked line
# standard bin
>> bind /$cputype/bin/nupas /$cpu/bin/upas
bind /$cputype/bin /bin
or (b) use the script usenupas anywhere upas is called. this
will be necessary for smtp, smtpd, imap4d, etc.
finally, take a look at validatesender. nupas smtpd
passes some extra arguments to /mail/lib/validatesender
to facilitate spf and spamhaus checks. the version provided
insists that both spf and spamhaus check out. alternately
one could use spamhaus only on spf fail or neutral.
i have a vague recollection of a large pile of spam that
passed spf checks so i haven't don that.
- erik
