> I am using postfix with mysql for virtual_mailbox_maps on a system.
> Everything seems to be working fine except for the fact that everynow
> and then I am getting messages like the following:

> May 20 14:56:18 <host> postfix/pipe[5168]: AA908518321:
> to=<<user>@<domain2>>, orig_to=<<user>@<domain1>>, relay=maildrop,
> delay=1.2, delays=1.2/0.01/0/0.04, dsn=5.1.1, status=bounced (user
> unknown. Command output: Invalid user specified. )

> I am trying to forward mail from <domain1> to <domain2>, which for the
> most part seems to work.  But then every now and then I get the above
> message.  I have read the documentation here :http://www.postfix.org/ADDRESS_REWRITING_README.html, but think I must
> be missing something.  If anyone could provide any insite it would be
> really appreciated.

> Here is my myrecipientmap.cf:
> @dajainc.com @dajainternational.com

> Here is my main.cf config:
> queue_directory = /var/spool/postfix
> command_directory = /usr/sbin
> daemon_directory = /usr/libexec/postfix
> mail_owner = postfix
> myhostname = dajainternational.com
> mydomain = $myhostname
> myorigin = $mydomain
> inet_interfaces = $myhostname, localhost
> mydestination = dajainternational.com, $transport_maps
> local_recipient_maps = $alias_maps $virtual_mailbox_maps
> unix:passwd.byname
> unknown_local_recipient_reject_code = 550
> alias_database = hash:/etc/aliases
> home_mailbox = Maildir/
> debug_peer_level = 2
> debugger_command =
>          PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
>          xxgdb $daemon_directory/$process_name $process_id & sleep 5
> sendmail_path = /usr/sbin/sendmail.postfix
> newaliases_path = /usr/bin/newaliases.postfix
> mailq_path = /usr/bin/mailq.postfix
> setgid_group = postdrop
> html_directory = no
> manpage_directory = /usr/share/man
> sample_directory = /usr/share/doc/postfix-2.3.3/samples
> readme_directory = /usr/share/doc/postfix-2.3.3/README_FILES
> smtpd_sasl_auth_enable = yes
> smtpd_sasl_path = smtpd
> smtpd_recipient_restrictions = permit_sasl_authenticated,
> permit_mynetworks, reject_unauth_destination
> smtpd_tls_cert_file = /usr/local/ssl/dajainternational.com.pem
> smtpd_tls_key_file = $smtpd_tls_cert_file
> smtpd_tls_CAfile = /usr/local/ssl/PositiveSSL-bundle.crt
> smtpd_use_tls = yes
> smtpd_tls_security_level = may
> smtpd_tls_loglevel = 0
> virtual_alias_maps = mysql:/etc/postfix/mysql-virtual.cf
> smtpd_sasl_security_options = noanonymous
> smtpd_sasl_local_domain = $myhostname
> broken_sasl_auth_clients = yes
> smtpd_recipient_restrictions = permit_mynetworks,
> permit_sasl_authenticated, check_recipient_access mysql:/etc/postfix/
> mysql-recipient.cf, reject_unauth_destination, permit
> smtpd_sender_restrictions = check_sender_access mysql:/etc/postfix/
> mysql-sender.cf
> smtpd_client_restrictions = check_client_access mysql:/etc/postfix/
> mysql-client.cf
> alias_maps = mysql:/etc/postfix/mysql-aliases.cf
> relocated_maps = mysql:/etc/postfix/mysql-relocated.cf
> transport_maps = mysql:/etc/postfix/mysql-transport.cf
> virtual_maps = mysql:/etc/postfix/mysql-virtual.cf
> virtual_mailbox_base = /home/vmail
> virtual_mailbox_maps = mysql:/etc/postfix/mysql-virtual-maps.cf
> virtual_uid_maps = mysql:/etc/postfix/mysql-virtual-uid.cf
> virtual_gid_maps = mysql:/etc/postfix/mysql-virtual-gid.cf
> canonical_maps = hash:/etc/postfix/myrecipientmap.cf