title: Postfix email rejected
body: <p>I've a postfix running for years without problems, but I've a recipient who doesn't recieve my mails.</p>
  
  <p>Here is the error log : </p>
  
  <pre><code>Jan 19 04:17:02 server05 postfix/smtp[25826]: 7A2C34023F: to=&lt;xxx@yyy.com&gt;, 
  relay=sssss.net[111.111.111.111]:25, delay=298684, delays=298676/0.01/2.3/6.3, dsn=4.1.7, 
  status=deferred (host sssss.net[111.111.111.111] said: 450 4.1.7 &lt;www-data@my_domain.fr&gt;: 
  Sender address rejected: unverified address: connect to my_domain.fr[222.22.5.5]:25: No route to host (in reply to RCPT TO command))
  </code></pre>
  
  <p>Any ideas ?</p>
  
  <p>My posfix configuration</p>
  
  <pre><code># postconf -n
  alias_database = hash:/etc/aliases
  alias_maps = hash:/etc/aliases
  command_directory = /usr/sbin
  config_directory = /etc/postfix
  daemon_directory = /usr/libexec/postfix
  data_directory = /var/lib/postfix
  debug_peer_level = 2
  html_directory = no
  inet_interfaces = localhost
  inet_protocols = all
  mail_owner = postfix
  mailq_path = /usr/bin/mailq.postfix
  manpage_directory = /usr/share/man
  message_size_limit = 20971520
  mydestination = $myhostname, localhost.$mydomain, localhost
  myhostname = my_domain.fr
  newaliases_path = /usr/bin/newaliases.postfix
  queue_directory = /var/spool/postfix
  readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
  sample_directory = /usr/share/doc/postfix-2.6.6/samples
  sendmail_path = /usr/sbin/sendmail.postfix
  setgid_group = postdrop
  unknown_local_recipient_reject_code = 550
  unverified_sender_reject_code = 550
  </code></pre>