... if you email me to say that your mail is down you really should include a phone number or some such. Some non-email way of contacting you at least!
I'm afriad that mail.imperialviolet.org doesn't point at anything any more. It's not a hard bounce, so mail won't fail because of it, but the server doesn't exist anymore. If you need a backup-MX I can set it up on my current mail server (a.mx.freenetproject.org).