On Mon, Aug 22, 2011 at 01:12:54PM +0100, Always Learning wrote: > > On Mon, 2011-08-22 at 13:07 +0100, Anne Wilson wrote: > > > <anne at xxxx.org>: host mailhost.zen.co.uk[212.23.3.98] said: > > 550-Verification > > failed for <anne at xxx.lan> 550-Unrouteable address 550 Envelope > > Sender: > > Domain must resolve in DNS! (in reply to RCPT TO command) > > Once your email is out on the Internet is needs a genuine Internet email > address. xxx.lan is known only to your internal system and it is not an > Internet email address. > > Care to show the headers of your outgoing email ? (cover-up the bits you > want to keep private) If you're running postfix, you might want to also edit /etc/aliases. The last line or so has a commented line, person who should get root's mail. (The name is marc, probably the person who first wrote it.) After changing that, run newaliases /etc/alias to rebuild the /etc/alias.db. To answer your other question, alternatives is the command you asked about in an earlier post alternatives --config mta This will show you if you're using postfix or sendmail. -- Scott Robbins PGP keyID EB3467D6 ( 1B48 077D 66F6 9DB0 FDC2 A409 FA54 EB34 67D6 ) gpg --keyserver pgp.mit.edu --recv-keys EB3467D6 Spike: Where have you been pet? Drusilla: I went for a walk. I met an old man. I didn't like him, he got stuck in my teeth.