Postfix mail for mydomain.com loops back to myself Problem

[stimpack]

I'm using vps server with ubuntu 10.04 when i send email i got this:

Mar 19 18:09:01 mail postfix/smtp[6340]: 8FAF722294: to=<root@mydomain.com>, orig_to=<root>, relay=none, delay=0.09, delays=0.08/0.01/0/0, dsn=5.4.6, status=bounced (mail for mydomain.com loops back to myself)

I look around inforums to find the solution but in vain even i changed my Postfix settings:

My destination setting was like this

    mail.mydomain.com, localhost.mydomain.com, , localhost

i changed it to this

 $mail.mydomain.com, localhost, localhost.mydomain.com, mydomain.com

i made many variations but still not working.

the output of `cat /etc/mailname`

 mail.mydomain.com

the output of `postconf -n`:

    alias_database = hash:/etc/aliases
    alias_maps = hash:/etc/aliases
    append_dot_mydomain = no
    biff = no
    config_directory = /etc/postfix
    inet_interfaces = all
    inet_protocols = ipv4
    mailbox_size_limit = 0
    milter_default_action = accept
    milter_protocol = 2
    mydestination = localhost.$mydomain.com, localhost, mail.mydomain.com
    myhostname = mail.dimonos.info
    mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 ip
    myorigin = $mydomain
    non_smtpd_milters = inet:localhost:8891
    readme_directory = no
    recipient_delimiter = +
    relayhost =
    smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
    smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
    smtpd_milters = inet:localhost:8891
    smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
    smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
    smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
    smtpd_use_tls = yes

[falko]

mydomain.com is missing in

mydestination = localhost.$mydomain.com, localhost, mail.mydomain.com