Postfix Loop Problem

lsteacke · 08-13-2007, 03:37 PM

I am having a problem with postfix, I get this error everytime I attempt to send an email.

Quote:

A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients. Contact your administrator.
< cbv-gateway #5.4.6 X-Postfix; mail for CBVillage.org loops back to myself

>

Posted below is my postconf -n

Quote:

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases, ldap:/etc/postfix/ldap-aliases.cf
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
mailbox_size_limit = 0
myhostname = cbv-gateway.cbvillage.org
mynetworks = 172.23.1.0/24, 127.0.0.0/8, 192.168.0.0/24, 10.32.1.0/30
myorigin = /etc/mailname
recipient_delimiter = +
relay_domains = cbvillage.org, cbv-gateway.cbvillage.org, localhost.cbvillage.org, localhost, cbvillage.local
relay_recipient_maps = hash:/etc/postfix/exchange_recipients
smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_recipient_restrictions = permit_sasl_authenticated,permit_mynetworks,reject_unauth_destination
smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtpd_use_tls = yes

Now you might see that I don't have a mydestination line in main.cf. The way I have it setup is relay_recipient_maps to an .db file which a perl script creates after it queries the exchange server and writes all the email addresses from the exchange server to a file called exchange_recipients. Instead of mydestinations I have relay_domains. Is this breaking postfix?

Thanks in advance

acid_kewpie · 08-13-2007, 04:10 PM

relaying is for mail passing *through* the machine, whilst mydestination defines what is for the server itself. so the mail in question just keeps passing itself round in circles, relaying to itself. only set up relay domains for mail that is *not* for you, but is trusted etc...

lsteacke · 08-13-2007, 04:24 PM

So should I setup mydestinations as well? Should mydestinations be the exchange server?

acid_kewpie · 08-14-2007, 02:38 AM

to be honest I'm not clear on that architecture you're trying to put together there... if it is meant to be passing that email on, then this postfix box needs to have a better MX record for that domain than itself. presumably if you look up the mx record on the box for this cbvillage.org domain then the best possible next hop as far as postfix is concerned is presumably to be itself. if this has gone off-net and just on a private LAN, then unless you specifically push those domains onwards to the exchange box then you would address your internal DNS to have better MX records relating to exchange over the box itself.

Berhanie · 08-14-2007, 10:12 AM

To add to what acid_kewpie has said, you also need to explicitly turn off $mydestination:

Code:

mydestination =

. With your present settings, mydestination is still defined. Run "postconf mydestination" and you'll see that at least your hostname is listed.

lsteacke · 08-14-2007, 10:36 AM

I apologize for being vague about the configuration. My box is indeed just a forwarding box, or at least it should be. Its running postfix/spamassassin and squid, and I would like to have it just forward the mail to the exchange server. Now I know postfix uses dns to do this, so I've been doing some investigating with the MX records and dns. I think this is the problem.

Thanks for the help guys.