After Install on SuSE 10.2

[Bill Brock]

Reporting-MTA: dns; test-linux.brckntwrks.com
X-Postfix-Queue-ID: AB1A621C25
X-Postfix-Sender: rfc822; bill@brocknetworks.com
Arrival-Date: Thu, 24 May 2007 09:26:19 -0500 (CDT)
Content-Type: text/plain

Final-Recipient: rfc822; admin@brckntwrks.com
Action: failed
Status: 5.0.0
Diagnostic-Code: X-Postfix; mail for brckntwrks.com loops back to myself

What would be causing this loopback error upon testing the mail server?

[mmorse]

Alias's, DNS, Hosts file, other redirects the list goes on (i'm gonna go with DNS first)


Kinda old but I found this interesting via a google search:
http://www.topology.org/linux/postfixloop.html

[Bill Brock]

Will ZCS use the DNS servers which are setup in SuSE's network configuration or does ZCS need to be told what resolver to use?

I'm using a DNS server other than the ZCS install server for resolution. I know the MX records are setup properly. Thus my question.

[mmorse]

yes it uses your machines dns settings

I was refering to brckntwrks.com which returns no answer- at least from the outside world:

$ dig mx brckntwrks.com
; <<>> DiG 9.3.4 <<>> mx brckntwrks.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 53500
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;brckntwrks.com. IN MX
;; AUTHORITY SECTION:
com. 900 IN SOA a.gtld-servers.net. nstld.verisign-grs.com. 1180026449 1800 900 604800 900
;; Query time: 4 msec
;; SERVER: mine
;; WHEN: Thu May 24 12:07:56 2007
;; MSG SIZE rcvd: 108


$ dig brckntwrks.com
; <<>> DiG 9.3.4 <<>> brckntwrks.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 63867
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;brckntwrks.com. IN A
;; AUTHORITY SECTION:
com. 878 IN SOA a.gtld-servers.net. nstld.verisign-grs.com. 1180026449 1800 900 604800 900
;; Query time: 3 msec
;; SERVER: (mine)
;; WHEN: Thu May 24 12:08:18 2007
;; MSG SIZE rcvd: 105


However there's tons of stuff on:
$ dig mx brocknetworks.com
; <<>> DiG 9.3.4 <<>> mx brocknetworks.com
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 14478
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 3, ADDITIONAL: 7
;; QUESTION SECTION:
;brocknetworks.com. IN MX
;; ANSWER SECTION:
brocknetworks.com. 3600 IN MX 4 mail3.brocknetworks.com.
brocknetworks.com. 3600 IN MX 3 mail2.brocknetworks.com.
brocknetworks.com. 3600 IN MX 2 webmail.brocknetworks.com.
brocknetworks.com. 3600 IN MX 1 mail.brocknetworks.com.
;; AUTHORITY SECTION:
brocknetworks.com. 172800 IN NS fs-brock.brocknetworks.com.
brocknetworks.com. 172800 IN NS fs2k-brock.brocknetworks.com.
brocknetworks.com. 172800 IN NS macdaddy.mcalestertvandpc.com.

;; ADDITIONAL SECTION:
mail3.brocknetworks.com. 3600 IN A 24.249.6.135
mail2.brocknetworks.com. 3600 IN A 24.249.6.168
webmail.brocknetworks.com. 3600 IN A 24.249.6.169
mail.brocknetworks.com. 3600 IN A 24.249.6.133
fs-brock.brocknetworks.com. 172800 IN A 24.249.6.62
fs2k-brock.brocknetworks.com. 172800 IN A 24.249.6.133
macdaddy.mcalestertvandpc.com. 172800 IN A 65.64.54.13
;; Query time: 11 msec
;; SERVER: (mine)
;; WHEN: Thu May 24 12:07:28 2007
;; MSG SIZE rcvd: 341

[Bill Brock]

Since it is just a test install, I have the start of authority on one of my other DNS servers and have set SuSE to resolve using that server. And since it is a test bed I don't have the domain registered.

Here is the zone file

;
; Database file brckntwrks.com.dns for brckntwrks.com zone.
; Zone version: 2007052213
;

@ 172800 IN SOA test-linux.brckntwrks.com. root.test-linux.brckntwrks.com. (
2007052213 ; serial number
10800 ; refresh
3600 ; retry
604800 ; expire
86400 ) ; minimum TTL

;
; Zone NS records
;

@ 172800 NS fs-brock.brocknetworks.com.
@ 172800 NS test-linux.brckntwrks.com.
@ NS fs2k-brock.brocknetworks.com.
fs2k-brock.brocknetworks.com. A 24.249.6.133

;
; Zone records
;

@ MX 10 test-linux.brckntwrks.com.
localhost A 127.0.0.1
test-linux 172800 A 192.168.1.199

[Bill Brock]

Now ZCS is telling me admin user doesn't exist as well as a second user I setup.

This is disheartening. My Windows mail server I've been using for four years installed and worked in 30 minutes. I've spent four day with ZCS and still problems.

I'm trying hard to Open source but it is leaving a lot of open sores :-)

[Bill Brock]

By default, ZCS listed the domain as the FQDN of the mail server instead of the domain portion. The admin then had an e-mail address of admin@test-linux.brckntwrks.com instead of admin@brckntwrks.com.

By adding a second domain and naming in simply brckntwrks.com and moving admin to that domain, sending mail to admin@brckntwrks.com no longer generated an error and the mail was delivered.

[mmorse]

glad you got it working-there's often so many variables it's hard to troubleshoot via forums-it often takes 5 posts just to figure out what the current running setup is