I've changed it and we'll see what happens.
FYI - SMTP is not running as a service. Sendmail is (I did a ps -ef and a chkconfig --list to verify).
libwrap (aka tcpwrappers) uses the service name I believe. Change sendmail to smtp and it might work. Also you don't need the ALL: ALL : DENY line in your hosts.allow, it's doesn't do anything.
Frank Wiles frank@wiles.org http://www.wiles.org