MPE/iX 7.5 sendmail support training

MPE/iX 7.5 Sendmail Support Training Page 20March 1, 2002
*.cf internals
(C and F – define
classes)
•a class can be thought of as a
macro containing multiple values
•C defines with constants, F defines
from files, pipes, or database maps:
Cwlocalhost
# file containing names of hosts
# for which we receive email
Fw/etc/mail/local-host-names
•classes perform matching in the left
hand side of rewriting rules
– $=class – match an entry in the
class
– $~class – match an entry not in the
class
# delete duplicate local names
# u%host@host => u@host
R$+ % $=w @ $=w $1 @ $2