title: delivery temporarily suspended: Host or domain name not found. Name service error for name=localdomain type=A: Host not found
body: <p>use email tool to send email to a test user i.e. isemailu5@slc00bly.us.oracle.com, email server is slc00bly.us.oracle.com.  and got the following issue, i think this should be some postfix configure issue, how should i to resolve it?:</p>
  
  <pre><code>ERROR:
  Feb 25 22:27:25 slc00bly postfix/qmgr[8481]: E90041941394: to=&lt;isemailu5@slc00bly.us.oracle.com&gt;, relay=none, delay=0.04, delays=0.03/0.02/0/0, dsn=4.3.5, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=localdomain type=A: Host not found)
  Feb 25 22:27:25 slc00bly postfix/qmgr[8481]: EEE6B1941395: to=&lt;isemailu5@slc00bly.us.oracle.com&gt;, relay=none, delay=0.02, delays=0.01/0.01/0/0, dsn=4.3.5, status=deferred (delivery temporarily suspended: Host or domain name not found. Name service error for name=localdomain type=A: Host not found)
  
  POSTFIX CONFIG:
  alias_database = hash:/etc/aliases
  alias_maps = hash:/etc/aliases
  command_directory = /usr/sbin
  config_directory = /etc/postfix
  daemon_directory = /usr/libexec/postfix
  debug_peer_level = 2
  html_directory = no
  inet_interfaces = all
  mail_owner = postfix
  mailq_path = /usr/bin/mailq.postfix
  manpage_directory = /usr/share/man
  mydestination = $myhostname, localhost.$mydomain, localhost, $mydomain
  mynetworks_style = class
  newaliases_path = /usr/bin/newaliases.postfix
  queue_directory = /var/spool/postfix
  readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
  relay_domains = $mydestination
  relayhost = $mydomain
  sample_directory = /usr/share/doc/postfix-2.3.3/samples
  sendmail_path = /usr/sbin/sendmail.postfix
  setgid_group = postfix
  unknown_local_recipient_reject_code = 550
  </code></pre>