On Wed, May 4, 2011 at 1:01 PM, Jeroen Geilman <jer...@adaptr.nl> wrote: > On 05/04/2011 09:36 PM, Christopher Adams wrote: >> >> Hello, >> >> I am attempting to get Postfix working as a relay to an Exchange 2010 >> server in the same subnet. The incoming mail may originate from the >> same subnet, but it all goes through a central server that is outside >> the subnet. I am doing this for troubleshooting connections between >> the central server and the Exchange server, so it is only temporary. >> >> The outside server would route mail through the server running >> Postfix, which would then relay to the Exchange server. >> >> To get the results that I want, without planning for a permanent setup >> to relay to Exchange, what Postfix configuration parameters do I need >> to set? >> >> These are the parameters that I am guessing have to be tinkered with >> and I have added some values, but am unsure about if I need to do >> anything with the others. Since I don't want mail to be delivered >> locally on the Postfix server, I am assuming that mydestination should >> be empty? >> > > When doing this sort of man-in-the-middle magic you need to consider all > worst-case scenarios. > These definitely include exchange being down and your postfix box queueing > the external mail. > Have you considered what should happen in that case ? > >> relay_domains = $mydestination, ip.of.outside.mailserver > > ...no, relay_domains contains the domains you wish to relay mail FOR. > In this case, the domains configured on the Exchange server and coming in > via the external MTA. > >> mydestination = (empty) > > You want mydestination set to the resolvable name of this postfix server, > or, at a minimum, to "localhost". > > If you set it explicitly to empty then no mail can ever be delivered locally > - including system mail to root or postmaster. > >> myorigin > > Is not directly involved in your setup, and defaults to $myhostname (which > should be fine). > >> relayhost = [exchange.server.ip] > > Note that this will send ALL mail to Exchange, not just the mail you receive > from the external MTA. > >> Thanks for getting me started in the right direction. > > Please start here, and work your way up: > > http://www.postfix.org/BASIC_CONFIGURATION_README.html > > > > -- > J. > >
Hello all, I have tinkered with getting Postfix to relay mail from an external (to the Exchange subnet) server to an Exchange 2010 server. I have not done any real tests yet, as this mail is all our organization mail and I want to get it right. Also, this is a temporary setup to try to troubleshoot some issues between the external server and Exchange. I have included the current output from postconf -n below. FYI - the external mail server(s) are in the subnet 159.121.109.0/24, the Exchange server accepts mail at 159.121.122.30 and 159.121.122.44, and the Postfix server is 159.121.122.15/hpl.osl.state.or.us. I set up a transport_map with the two ips for the Exchange server like this. Not sure if that is correct, but then I have questions about much of this. I would appreciate helpful comments that could get me further along. Thanks. Transport: oslmail.osl.state.or.us relay:[159.121.122.30] oslexchange.osl.state.or.us.local relay:[159.121.122.44] postconf -n output: 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 = 5 debug_peer_list = hpl.osl.state.or.us default_privs = nobody html_directory = no inet_interfaces = $myhostname, localhost mail_owner = postfix mail_spool_directory = /var/spool/mail mailq_path = /usr/bin/mailq.postfix manpage_directory = /usr/share/man message_size_limit = 10000000 mydestination = $myhostname, localhost.$mydomain, localhost, hpl.$mydomain mydomain = osl.state.or.us myhostname = hpl.osl.state.or.us mynetworks = 159.121.122.0/24, 127.0.0.0/8, 159.121.109.41, 159.121.109.42, 159.121.109.43, 159.121.109.44, 159.121.105.151 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, 159.121.122.30, 159.121.122.44, 159.121.109.41, 159.121.109.42, 150.121.109.43, 159.121.109.44, 159.121.105.151 relayhost = sample_directory = /usr/share/doc/postfix-2.3.3/samples sendmail_path = /usr/sbin/sendmail.postfix setgid_group = postdrop smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, check_relay_domains smtpd_sasl_auth_enable = yes smtpd_sasl_local_domain = $myhostname smtpd_sasl_security_options = noanonymous transport_maps = hash:/etc/postfix/transport unknown_local_recipient_reject_code = 550 -- Christopher Adams adam...@gmail.com
