I added a couple lines to .muttrc as recommended (I had most but not all those lines). Now I don't get the Message Undeliverable emails, but they still don't get through. Except one. I sent a test mail to all of my U of M accounts (I have three) and one got through. I got so excited and started sending more mails but none of them got through. As for what I have in the local-host-names file, I put 'slava.net' because that's what's at the end of my email address... that's my homepage and so on. What should be there? Lorry, who has said '$&%* it' and is using Mozilla until this gets sorted