When I try to send a mail, I get one back from "Mail Delivery Subsystem" subject "Returned mail: see transcript for details" Before messing with sendmail, the same thing happened, but it happened right away. Now I don't get it until a little bit later. One of the things that messed up, that I had to fix... I made all the files the site said to, and then I ran the m4 blah blah command. One of the errors I got was that there was no etc/mail/local-host-names file. So I made one, but perhaps I didn't do it right. That site didn't say anything about making this file, so... what was I supposed to put in it? Could this be where it's screwing up? Lorry, frustrated but still going!