Can't send external email

[bradley8424]

I replaced my Cisco T1 router using the same configuration. I had to restart my router, running CentOS, which hadn't been restarted in a long long time. I think when I did this I lost some of the configuration. I'm trying to get everything back up and running. It seems like Zimbra can send/receive internal mail just fine. It can receive external mail. However, it cannot send any external mail. What configurations should I check on Zimbra and the router?

[uxbod]

Welcome to the forums

First thing it would be really helpful if you were to update your profile with the following output so we know which version of ZCS you are running

su - zimbra
zmcontrol -v

Have you tried telnetting to a remove SMTP server on port 25 to ensure that it is open ? Have you checked /var/log/zimbra.log to see why they are being deferred ? Are DNS lookups working okay ?

[phoenix]

Which release of Zimbra? Please update your form profile with the output of the following:

zmcontrol -v

There's an option in the Admin UI to 'Enable DNS Lookup' that should be checked. Do you have a Split DNS set-up? Please post the output of the following commands (run on the Zimbra server):

cat /etc/hosts
cat /etc/resolv.conf
dig yourdomain.com mx
dig yourdomain.com any
host `hostname`  <-- type that exact command using backticks not single quotes

[uxbod]

Ding dong Bill - we manage to do it again

[bradley8424]

Originally Posted by uxbod

Welcome to the forums

First thing it would be really helpful if you were to update your profile with the following output so we know which version of ZCS you are running

su - zimbra
zmcontrol -v

Have you tried telnetting to a remove SMTP server on port 25 to ensure that it is open ? Have you checked /var/log/zimbra.log to see why they are being deferred ? Are DNS lookups working okay ?

Release 4.5.0_RC2_566.DEBIAN3.1 DEBIAN3.1 FOSS edition

I have successfully telnetted to a gmail smtp server. I don't think the /var/log/zimbra.log is working. How can I tell if DNS lookups are working OK? Which DNS lookups do you mean? I am able to ping google.com etc.

[bradley8424]

Originally Posted by phoenix

Which release of Zimbra? Please update your form profile with the output of the following:

zmcontrol -v

There's an option in the Admin UI to 'Enable DNS Lookup' that should be checked. Do you have a Split DNS set-up? Please post the output of the following commands (run on the Zimbra server):

cat /etc/hosts
cat /etc/resolv.conf
dig yourdomain.com mx
dig yourdomain.com any
host `hostname`  <-- type that exact command using backticks not single quotes

I get the same results with 'Enable DNS Lookup' checked and not checked. Split DNS is not set up.

zimbra@zimbra:~$ cat /etc/hosts
#10.0.1.4 zimbra.example.com zimbra
127.0.0.1 localhost.localdomain localhost zimbra.example.com zimbra

zimbra@zimbra:~$ cat /etc/resolv.conf
# Generated by dhcpcd for interface eth0
nameserver 10.0.1.254

zimbra@zimbra:~$ dig example.com mx
-su: dig: command not found

zimbra@zimbra:~$ host `hostname`
-su: host: command not found

[uxbod]

Your /etc/hosts is completely wrong! It should look like

127.0.0.1   localhost.localdomain   localhost
::1 localhost6.localdomain6 localhost6
10.0.1.4   zimbra.example.com zimbra

And as you are behind a firewall on a private IP you should be running a Wiki :: Split DNS architecture.

[bradley8424]

Originally Posted by uxbod

Your /etc/hosts is completely wrong! It should look like

127.0.0.1   localhost.localdomain   localhost
::1 localhost6.localdomain6 localhost6
10.0.1.4   zimbra.example.com zimbra

And as you are behind a firewall on a private IP you should be running a Wiki :: Split DNS architecture.

What's really amazing is that everything was working just fine yesterday. I don't think Split DNS was ever set up because BIND is not installed on this machine at all.

[uxbod]

Check all your Wiki :: Log Files for any error messages.