From: groups (groupsobsd.us)
Date: Sun Apr 18 2010 - 12:04:17 CDT

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> Following the firewall/smtp relay page
> http://www.postfix.org/STANDARD_CONFIGURATION_README.html#firewall
>
> Process
> - internal servers *send* through *my-relay*
> - *my-relay* forwards to *master-relay*
> - valid email is passing through for all the clients as expected.
>
> - *master-relay* kicks back any undeliverable emails to *my-relay*
> I want the undeliverable email to be sent and received on *my-relay*
> and not my work account.
> - I work with end users to "fix" their undeliverable issue.
>
> -- Bounce messages are *not* being received back from the *master-relay*
> to *my-relay*.
>
> Particulars
> -- OS: CentOS 5.4
> -- my-dom.TLD = my domain
> -- SUB-DOM = my sub domain
>
> Postfinger
> --System Parameters--
> mail_version = 2.5.1
> hostname = mailhost.SUB-DOM.my-dom.TLD
> uname = Linux mailhost.SUB-DOM.my-dom.TLD 2.6.18-164.15.1.el5 #1 SMP Wed
> Mar 17 11:37:14 EDT 2010 i686 i686 i386 GNU/Linux
>
> --Packaging information--
> looks like this postfix comes from RPM package: postfix-2.5.1-1.rhel5
>
> --main.cf non-default parameters--
> alias_database = hash:/etc/postfix/aliases
> alias_maps = hash:/etc/postfix/aliases
> html_directory = /usr/share/doc/postfix-2.5.1-documentation/html
> local_transport = error:local mail delivery is disabled
> mailq_path = /usr/bin/mailq.postfix
> manpage_directory = /usr/share/man
> mime_header_checks = regexp:/etc/postfix/mime_header_checks.regexp
> mydestination =
> mynetworks = ppp.pp.0.0/16, DDD.dd.0.0/16
> newaliases_path = /usr/bin/newaliases.postfix
> readme_directory = /usr/share/doc/postfix-2.5.1-documentation/readme
> relay_domains = SUB-DOM.my-dom.TLD, my-dom.TLD
> relayhost = *master-relay*.my-dom.TLD
> sendmail_path = /usr/sbin/sendmail.postfix
> smtpd_data_restrictions = reject_unauth_pipelining,permit_mynetworks
> transport_maps = hash:/etc/postfix/transport
> unknown_local_recipient_reject_code = 450
> virtual_alias_maps = hash:/etc/postfix/virtual
>
> --master.cf--
> smtp inet n - n - - smtpd
> pickup fifo n - n 60 1 pickup
> cleanup unix n - n - 0 cleanup
> qmgr fifo n - n 300 1 qmgr
> tlsmgr unix - - n 1000? 1 tlsmgr
> rewrite unix - - n - - trivial-rewrite
> bounce unix - - n - 0 bounce
> defer unix - - n - 0 bounce
> trace unix - - n - 0 bounce
> verify unix - - n - 1 verify
> flush unix n - n 1000? 0 flush
> proxymap unix - - n - - proxymap
> proxywrite unix - - n - 1 proxymap
> smtp unix - - n - - smtp
> relay unix - - n - - smtp
> -o smtp_fallback_relay=
> showq unix n - n - - showq
> error unix - - n - - error
> retry unix - - n - - error
> discard unix - - n - - discard
> local unix - n n - - local
> virtual unix - n n - - virtual
> lmtp unix - - n - - lmtp
> anvil unix - - n - 1 anvil
> scache unix - - n - 1 scache
>
> -- end of postfinger output --
> --
> /etc/postfix/virtual
> root rootmailhost.SUB-DOM.my-dom.TLD
> me memailhost.SUB-DOM.my-dom.TLD
> --
> /etc/postfix/aliases
> #root: memy-domain.TLD
> root: melocalhost
>
> Thx
> CT

I had asked this about 2 weeks ago but could not test it until it was in
   place..

I did try the
mydestination = $myhostname
and
mydestination = $my-SUB-DOMAIN..

Thx
Ct

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