hi,
I have postfix 2.2.10, how to make postfix only relay certain domain mail?like only "test.com" email can be pass throught.
second question is after I change /etc/postfix/virtual, I restart postfix, but the setting in "virutal" still working, what should I do?
thanks in advance!
jimmy

Start here http://www.postfix.org/postconf.5.html#relay_domains

Did you postmap virtual (ie postmap /etc/postfix/virtual) to create the db?

postmap is working, but can you tell me what exactly I should change in main.cf? I know "Postfix relays mail "trusted" clients (IP address matches $mynetworks) to any destination".
but I only want "trusted" clients relay mail to one destination like " test.com, what should I do?
thanks!
jimmy

postmap is working, but can you tell me what exactly I should change in main.cf? I know "Postfix relays mail "trusted" clients (IP address matches $mynetworks) to any destination".
but I only want "trusted" clients relay mail to one destination like " test.com, what should I do?
thanks!
jimmy

I don't follow your comment about virtual by the way.


I'm not sure I've done this myself before, but here's what I think you need without trying it

relay_domains = $mydestination, test.com

transport_maps = hash:/etc/postfix/transport

in /etc/postfix/transport

test.com smtp:destination_server.com

where destination_server.com is the server you want to relay to.

You need to postmap transport btw.

In this setup, any domains listed in mydestination will deliver locally, test.com will deliver via relay. I think this will work with vitual domains, but may not

I thinks you didn't get what I mean.

the postfix server IP is 192.168.1.103, the mail will come from the other server 192.168.1.183( they are in same lan).

right now the server 192.168.1.183 can send mail to any destination relay from 192.168.103, but I want limit the destination to "opt-intelligence.com" only, so only the email from 192.168.1.103 and from address is "xxx@opt-intelligence.com" and "to address" is "xxx@opt-intelligence.com" can be replayed in 192.168.1.103.

here is my "postconf -n"
[root@optimization postfix]# postconf -n
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 = /usr/share/doc/postfix-2.2.10-documentation/html
inet_interfaces = 192.168.1.103
mail_owner = postfix
mailbox_size_limit = 10485760000
mailq_path = /usr/bin/mailq.postfix
manpage_directory = /usr/share/man
message_size_limit = 209715200
mydomain = opt-intelligence.com
mynetworks = 192.168.1.183, 192.168.1.232
newaliases_path = /usr/bin/newaliases.postfix
queue_directory = /var/spool/postfix
readme_directory = /usr/share/doc/postfix-2.2.10-documentation/readme
sample_directory = /etc/postfix
sendmail_path = /usr/sbin/sendmail.postfix
setgid_group = postdrop
smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination, reject_unlisted_recipient
unknown_local_recipient_reject_code = 550

I finally figure it out, hope the following configuration can help people has same question as mine.
1.[root@optimization ~]# vi /etc/postfix/main.cf
smtpd_client_restrictions = check_client_access hash:/etc/postfix/access, reject
smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/access, reject
smtpd_recipient_restrictions = check_recipient_access hash:/etc/postfix/access, reject


2.[root@optimization ~]# vi /etc/postfix/access

intelligence.com OK
192.168.1.183 OK
127.0.0.1 OK

3.[root@optimization ~]# postmap /etc/postfix/access
[root@optimization ~]# postfix reload
postfix/postfix-script: refreshing the Postfix mail system

I think the most logical and easiest way to do this is use transport_maps.

I had the same problem and i only had access to the relaying server (the server which relays mail to the remote server).

I just added transport_maps = hash:/etc/postfix/transport to main.cf.

Then vi /etc/postfix/transport

example.com smtp:relayhostort
* error: Only allowing one domain

postmap /etc/postfix/transport

reload postfix

Now its working without any issue.

Hope this helps for someone.