Paul, > You need to install the sendmail-cf package, read the configuration > README and edit /etc/mail/sendmail.mc with your favourite editor. Thank you for that. Where is the README file hidden ? > Having said that, the default configuration works out of the box for > many people. What would I have to insert in the snedmail.mc file to allow relaying only from the machines in the internal network: 192.168.1.* ? Jonathan