if i send message myself, i see such error in /var/log/maillog:
B7A094F2043F: to=<email@example.com>, orig_to=<firstname.lastname@example.org>, relay=none, delay=1, status=bounced (Host or domain name not found. Name service error for name=localhost.localhost type=A: Host not found)
i'm 100% sure, email exists. and web11_me exists too. and if ping localhost.localhost, 127.0.0.1 (so my server) replies.
ftp, www, sending emails work. the only one which doesnt is receiving emails :/
i'm under fedora core 4, setuped by "the perfect setup"