25: Connection refused - Added IP to virtualmin server and new IP cannot receive email

Virtualmin
1

Hi,

I added a second site to my virtualmin box with its own IP address.

For some reason when email is sent to the new domain/IP postfix refused the connection to 25.

If i set the mail server for the new domain to the host domain mail.1stdomain.com it works, mail.2nddomain.com does not work with:

error:
(postfix/smtp[17181]: connect to mail.2nddomain.com[1xx.xxx.xxx.xxx]:25: Connection refused

postfix is set to receive on all connections.

Any help would be appreciated!

2

Howdy,

What is the output of these two commands:

netstat -an | grep :25 iptables -L -n

Also, do emails to other domains work as expected?

-Eric

3

tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN
tcp 0 0 1xx.xxx.xx.86:25 0.0.0.0:* LISTEN
tcp 0 0 1xx.xxx.xx.84:25 0.0.0.0:* LISTEN
tcp 0 0 0.0.0.0:2525 0.0.0.0:* LISTEN
tcp6 0 0 :::2525 :::* LISTEN

.85 is the domain in question, which seems to not be listening. I checked this earlier and could have sworn i saw .25 (it was 8am though).

Yes other domains are working just fine.

as for iptables - I have completely disabled firewall (csf)

root@ns1:/var/log# iptables -L -n
Chain INPUT (policy ACCEPT)
target prot opt source destination

Chain FORWARD (policy ACCEPT)
target prot opt source destination

Chain OUTPUT (policy ACCEPT)
target prot opt source destination

4

Howdy,

You may be seeing a problem with your /etc/postfix/master.cf file then. My suggestion is to review it, and make sure that there is an “smtp” line that contains the IP address you need to be listening.

-Eric

5

Thanks Andreycheck, that seems to have been the issue. Any idea why this would not have been automated when placing the account on its own ip?

6

Unfortunately, it may be a bug with Virtualmin setting what IP’s Postfix is listening on. There’s a few other folks who had reported something similar recently.

I have added this to my notes of things to discuss with Jamie.

-Eric

7

Well, that saved me the work to create a new thread with this bug.

I found the same problem here on a fresh virtualmin installation on a fresh installed debian 8 server. there are 12+1 ip adresses directing to the server (already during the installation) and everything is working fine with the “main ip”. but creating a new domain and attching it to another IP, no mails are working any more for that domain (smtp), but the apache is running. VERY frustrating and i spent hours to find that problem.

your solution this the missing IP in the master.cf is right. i found that one hour ago also: copying the line and entering the IP manually … brought smtp back to work.

but with my number of IP addresses it’s too much work to control everything manually.
is there a fix planned ?

regards,
Snop