title: Postfix - status=bounced (unknown user "myuser")
body: <p>I am configuring Postfix and when validating by telnet and SMTP I got the status bounced error, unknown user:</p>
  <p><strong>Error log</strong>:</p>
  <blockquote>
  <p>postfix/local[18718]: 4590D7DC0A51: to=myuser@mydomain.example, relay=local, delay=9.8, delays=9.8/0.01/0/0.04, dsn=5.1.1, status=bounced (unknown user: &quot;myuser&quot;)</p>
  </blockquote>
  <p>The &quot;myuser&quot; already exists, but with full domain name: <code>myuser@mydomain.example</code>.</p>
  <p><strong>User Validation</strong>:</p>
  <pre><code> postmap -q myuser@mydomain.example mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
  </code></pre>
  <p>Output is: &quot;1&quot; - so I guess it is OK.</p>
  <p><strong>My postfix Configuration</strong>:</p>
  <pre><code>root# postconf -n:
  append_at_myorigin = yes
  biff = no
  config_directory = /etc/postfix
  default_destination_concurrency_limit = 1
  delay_warning_time = 8h
  disable_vrfy_command = yes
  dovecot_destination_concurrency_limit = 1
  dovecot_destination_recipient_limit = 1
  enable_original_recipient = yes
  local_destination_concurrency_limit = 1
  maximal_queue_lifetime = 6d
  mydestination = mydomain.example
  smtpd_client_restrictions = permit_mynetworks, permit_sasl_authenticated
  smtpd_delay_reject = no
  smtpd_hard_error_limit = 10
  smtpd_helo_required = yes
  smtpd_helo_restrictions = permit_mynetworks, reject_invalid_hostname
  smtpd_recipient_restrictions = permit_mynetworks, reject_unknown_sender_domain,             reject_unknown_recipient_domain, reject_unlisted_recipient, reject_unauth_destination, reject_unauth_pipelining
  smtpd_sender_restrictions = permit_mynetworks, reject_unknown_sender_domain
  smtpd_soft_error_limit = 5
  strict_rfc821_envelopes = yes
  virtual_alias_maps = mysql:/etc/postfix/mysql-virtual-alias-maps.cf,mysql:/etc/postfix/mysql-email2email.cf
  virtual_mailbox_domains = mysql:/etc/postfix/mysql-virtual-mailbox-domains.cf
  virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-mailbox-maps.cf
  virtual_transport = dovecot
  </code></pre>