John Beck wrote: > Warren> and if so how? - using SMF? > > No, even simpler. If you have a "sendmail:" line in /etc/hosts.{allow,deny} > then sendmail thru its libwrap interface will honor it/them.
BTW this is exactly the same for sshd. Both sendmail and sshd get their TCP Wrappers support directly from libwrap and have had that since before SMF existed. -- Darren J Moffat