Hello all, I have a problem with mail relaying. Testing my machine (at home) with the test at http://www.abuse.net/relay.html, I found that it was indeed relaying. That was a surprise, because I thought I had a default configuration and that the default would not allow relaying. I selected "host with permanent net connection" in yast. In order to get things going, I had to set FROM_HEADER="elec.canterbury.ac.nz" in rc.config, which leads to a DMelec.canterbury.ac.nz line in sendmail.cf. Without this, email to kuhlmav@elec.canterbury.ac.nz leaves my host (as /var/log/mail shows), but never arrives - presumably because the university's mail gateway cantva.canterbury.ac.nz trashes it. I remember having had problems before if the sending host's (mine) FQN doesn't resolve (although it seemed I can put anything I want, as long as it resolves). How can I configure things to make email work, but block relaying? Thanks for any help, Volker