untar
cd sendmail-VERSION
cd sendmail
sh Build
cd ../cf/cf
cp generic-linux.mc sendmail.mc
edit sendmail.mc - add in options
sh Build sendmail.cf
sh Build install-cf


FOR RELAY/GATEWAY SERVER
useradd smmsp ; add smmsp group as #25
cd ../../sendmail/
sh Build install
ensure:

-r-xr-sr-x	root   smmsp	... /PATH/TO/sendmail
drwxrwx---	smmsp  smmsp	... /var/spool/clientmqueue
drwx------	root   wheel	... /var/spool/mqueue
-r--r--r--	root   wheel	... /etc/mail/sendmail.cf
-r--r--r--	root   wheel	... /etc/mail/submit.cf


FOR SERVER RUNNING PINE
sh Build install-set-user-id
This is so that PINE can write to /var/spool/mqueue
sendmail will look like:

-r-sr-xr-x      root   bin      ... /PATH/TO/sendmail


Good Sendmail 8.12 .mc file options below...


# Comments...
# Most features taken from 
# http://www.linuxjournal.com/article.php?sid=5753 - READ IT!
# Put these lines BEFORE the MAILER lines in the generic-*.mc file
# Note that on "gateway/relay" mail servers, you can install sendmail
# as user:group smmsp:smmsp like the INSTALL and sendmail/SECURITY files
# recommend. On servers where PINE will be used, sendmail needs to be
# setuid root (i.e. chmod 4555 /usr/sbin/sendmail) so it can write to 
# /var/spool/mqueue

# remove old stuff
undefine(`UUCP_RELAY')
undefine(`BITNET_RELAY')

FEATURE(`mailertable', `hash -o /etc/mail/mailertable.db')dnl
FEATURE(`virtusertable', `hash -o /etc/mail/virtusertable.db')dnl
FEATURE(access_db)dnl

MASQUERADE_AS(`domain.net')dnl
MASQUERADE_DOMAIN(`.domain.net')dnl
EXPOSED_USER(`root')dnl
EXPOSED_USER(`postmaster')dnl
FEATURE(`masquerade_entire_domain')dnl
FEATURE(`masquerade_envelope')dnl

# add local host name to incomplete addresses
FEATURE(always_add_domain)dnl

# look at /etc/mail/local-host-names - was called sendmail.cw
FEATURE(use_cw_file)dnl

# Stop SPAM
FEATURE(`dnsbl')
FEATURE(dnsbl,`blackholes.mail-abuse.org',` Mail from $&{client_addr} rejected; see http://mail-abuse.org/cgi-bin/lookup?$& {client_addr}')dnl
FEATURE(dnsbl,`relays.mail-abuse.org',` Mail from $&{client_addr} rejected; see http://work-rss.mail-abuse.org/cgi-bin/nph-rss?$& {client_addr}')dnl
FEATURE(dnsbl,`dialups.mail-abuse.org',` Mail from dial-up rejected; see http://mail-abuse.org/dul/enduser.htm')
FEATURE(dnsbl,`dun.dnsbl.net')dnl
FEATURE(dnsbl,`spam.dnsbl.net')dnl