Outbound Relay Question

[mikec]

Can anyone tell me if I can create an outbound relay for just one of the Virtual domains. I have several domains but only one of them needs an Outbound relay to Postini archive services.

Thanks

[uxbod]

Out of the box I don't think you can do it in ZCS, but have a read of these for making the changes yourself :-

How to use sender_dependent_relayhost_maps in master.cf - ReadList.com
Postfix Configuration Parameters

You could also file a RFE to allow the relay to be specifed by domain

[uxbod]

Bug 32740 - Per domain Relay MTA for external delivery. So now please vote

[mikec]

How to use sender_dependent_relayhost_maps in master.cf - ReadList.com

this works with a little modification.


***Here is what I did*** Tested and it works on a per domain level.

[zimbra@mail conf]$ tail -20 main.cf
smtpd_tls_loglevel = 1
relayhost =
disable_dns_lookups = no
content_filter = smtp-amavis:[127.0.0.1]:10024
virtual_mailbox_maps = ldap:/opt/zimbra/conf/ldap-vmm.cf
version = 2.4.3.4z
mailq_path = /opt/zimbra/postfix-2.4.3.4z/sbin/mailq
header_checks = pcre:/opt/zimbra/conf/postfix_header_checks
smtpd_use_tls = yes
queue_directory = /opt/zimbra/postfix-2.4.3.4z/spool
newaliases_path = /opt/zimbra/postfix-2.4.3.4z/sbin/newaliases
smtpd_reject_unlisted_recipient = yes
smtpd_data_restrictions = reject_unauth_pipelining
smtpd_tls_key_file = /opt/zimbra/conf/smtpd.key
command_directory = /opt/zimbra/postfix-2.4.3.4z/sbin
smtpd_sasl_auth_enable = yes
sender_dependent_relayhost_maps = hash:/opt/zimbra/postfix/conf/sender_relay
recipient_bcc_maps = pcre:/opt/zimbra/postfix/conf/recipient_bcc.pcre
sender_bcc_maps = pcre:/opt/zimbra/postfix/conf/sender_bcc.pcre

/opt/zimbra/postfix/conf/sender_relay:

@domain-a.com smtpdhost1
@domain-b.com smtpdhost2

***Make sure you hash the sender_relay after adding rules.
$postmap hash:/opt/zimbra/postfix/conf/sender_relay

[zimbra@mail conf]$ ls -ltr sender_rel*
-rw-r----- 1 zimbra zimbra 52 Oct 31 10:26 sender_relay
-rw-r----- 1 zimbra zimbra 12288 Oct 31 10:35 sender_relay.db


also see How to use sender_dependent_relayhost_maps in master.cf - ReadList.com

[mikec]

Actually there is one problem with the above config... If mail is sent from userA@domainA.com to userB@domainA.com or userA@domainA.com to userA@domainB.com (both domains or users on the same Zimbra installation) the sender_relay is ignored. This will be the item to tackle as we are required to archive all email.

I’m wondering if there is a way to force postfix to look the sender_relay for all outbound mail even if the person receiving is on the same server.

[mikec]

Does anyone know a way to get around the LMTP? I can get per domain relay host working using the sender_relay param but this param is bypassed when the sender and receiver are on the same domain/server. I need a way to tell the LMTP to use the sender_relay for all emails sent from this domain even if the user/receiver is local.


Any Ideas?

Thanks

[gregor]

@mikec: thx for the short tutorial.

i found another sheet with more informations: Postfix Small/Home Office Hints and Tips

but the multiple isp accounts doesn't work, its only works when i write in the first column from sasl_passwd the smtp-server. but then i can only send from one user because the other user a blocked because the login-informations are mismatch (i testet it with gmx).

what can be the problem?

[gregor]

push !!! (>10 chars)