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-   -   Virtual Users and Domains : Mail Loops back to Myself (http://www.howtoforge.com/forums/showthread.php?t=39882)

uni 5th October 2009 22:12

Virtual Users and Domains : Mail Loops back to Myself
 
I followed the Ubuntu 9.04 tutorial two different times now and I always get the Postfix, "Mail.example.com Loops back to myself" error so I was hoping for a little help. I've searched through all threads about this before posting, btw.

I'm wondering if my MySQL transport table has the right values.

Hostname = server1.example.com
MX record points = mail.example.com

I used 'mail.example.com' in all my configs (except where it reflected domain name, and I put in 'example.com')

Should my transport table value be:

source + destination
example.com + server1.example.com (changed but not tested yet)
example.com + mail.example.com (this does not work)


If there's anything else I can check, I'd appreciate some help as I'd really like to get this working.

Output of 'postconf -n'

Quote:

alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
broken_sasl_auth_clients = yes
config_directory = /etc/postfix
content_filter = amavis:[127.0.0.1]:10024
html_directory = /usr/share/doc/postfix/html
inet_interfaces = all
mailbox_size_limit = 0
mydestination = mail.example.com, localhost, localhost.localdomain
myhostname = mail.example.com
mynetworks = 127.0.0.0/8
myorigin = /etc/mailname
proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $relay_domains $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $transport_maps $mynetworks $virtual_mailbox_limit_maps
readme_directory = /usr/share/doc/postfix
receive_override_options = no_address_mappings
recipient_delimiter = +
relayhost =
smtp_host_lookup = native
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_unauth_destination
smtpd_sasl_auth_enable = yes
smtpd_sasl_authenticated_header = yes
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf
virtual_alias_domains =
virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, mysql:/etc/postfix/mysql-virtual_email2email.cf
virtual_gid_maps = static:5000
virtual_mailbox_base = /home/vmail
virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf
virtual_mailbox_limit_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailbox_limit_maps.cf
virtual_mailbox_limit_override = yes
virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf
virtual_maildir_extended = yes
virtual_maildir_limit_message = "The user you are trying to reach is over quota."
virtual_overquota_bounce = yes
virtual_uid_maps = static:5000
Mailog error:

Quote:

Oct 5 10:28:13 server1 postfix/smtp[3764]: 2D597B427A: to=<sales@example.com>, relay=none, delay=0.07, delays=0.02/0.04/0.01/0, dsn=5.4.6, status=bounced (mail for mail.example.com loops back to myself)

falko 6th October 2009 13:45

mail.example.com is already in the mydestination line, so I don't know why you still see that error. Did you restart Postfix?

uni 6th October 2009 23:03

RE: Virtual Domains, Mail loops back to myself
 
Yes, I restarted Postfix many times . I've tried a lot of different things and then undone them when they didn't work. This is really strange. I can't get any further. Is there any Postfix diags I can run that would tell me what's going on?

Thanks,
UNi

uni 9th October 2009 00:43

RE: Virtual Domains, Mail loops back to myself SOLVED
 
For some reason this line in /etc/postfix/main.cf causes a mail loop for my system:

#transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf

I basically reinstalled Postfix, got things working, then worked backwards to find the culprit.

-UNi

Also, as someone else mentioned, SpamAssassin is not enabled by default in the tutorial.
pico etc/default/spamassassin
** Move it to ON, 1

cpress 9th May 2010 07:18

After days of searching around trying to figure out what was going on (i had the same issue), I finally came across this.

It actually has to do with the transport table itself. You do not need to populate this table. Keep it empty on a fresh install. It only applies if you are sending the message elsewhere to have it delivered.

kramse 19th May 2010 20:40

Nice this one helped me too.
I followed this guide when I ran into the same problem: http://www.howtoforge.com/virtual-us...il-ubuntu-9.10

When disabling the line:
#transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf

What am I actually disabling? the feature of having more than one domain?

kramse 19th May 2010 21:08

Quote:

Originally Posted by cpress (Post 227656)
It actually has to do with the transport table itself. You do not need to populate this table. Keep it empty on a fresh install. It only applies if you are sending the message elsewhere to have it delivered.

I enabled the line again, and emptied the transport table instead. Does this confllict in anyway with the line in main.cf:
relayhost = <here I have my isp smtp>


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