[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [X] [Y] [Z] bestmx_is_local feature, local mail delivery BITNET_RELAY define blackhole lists (DNS) creating overriding spam and 2nd using service blacklist_recipients blocking outbound mail spam and -bp command-line option, restricting use Build install-cf command Build utility compared to m4 command line compiling sendmail building master configuration file sendmail.cf file 2nd -bv option restricting use |