postfix not listening on any port

I noticed mailq is filling up since Friday, when Debian Jessie got apt-get upgrade and reboot. ISPConfig 3.1.13p1

I found https://www.howtoforge.com/postfix-amavisd-connect-to-127.0.0.1-10024-connection-refused searching with the error I get in mail.log

Code:

dsn=4.4.1, status=deferred (connect to 127.0.0.1[127.0.0.1]:10024: Connection refused)

Using that tutorial, I checked with netstat -tap that amavis is running:

Code:

# netstat -tap | grep amavis
tcp6       0      0 localhost:10024         [::]:*                  LISTEN      1206/amavisd-new (m
tcp6       0      0 localhost:10026         [::]:*                  LISTEN      1206/amavisd-new (m

But it is running only TCP6, not plain TCP. Don't know why.
Postfix is not visible in netstat -tap, but is running:

Code:

# systemctl status postfix
● postfix.service - LSB: Postfix Mail Transport Agent
   Loaded: loaded (/etc/init.d/postfix)
  Drop-In: /run/systemd/generator/postfix.service.d
           └─50-postfix-$mail-transport-agent.conf
   Active: active (running) since ma 2019-04-29 13:34:08 EEST; 18min ago
  Process: 10035 ExecStop=/etc/init.d/postfix stop (code=exited, status=0/SUCCESS)
  Process: 1392 ExecReload=/etc/init.d/postfix reload (code=exited, status=0/SUCCESS)
  Process: 10062 ExecStart=/etc/init.d/postfix start (code=exited, status=0/SUCCESS)
   CGroup: /system.slice/postfix.service
           ├─10172 /usr/lib/postfix/master
           ├─10173 pickup -l -t unix -u -c
           ├─10174 qmgr -l -t unix -u
           ├─10176 tlsmgr -l -t unix -u -c
           ├─10505 anvil -l -t unix -u -c
           ├─11226 smtpd -n smtp -t inet -u -c -o stress= -s 2
           └─11233 smtpd -n smtp -t inet -u -c -o stress= -s 2

huhti 29 13:51:00 ispcjessie postfix/smtpd[11233]: disconnect from unknown[103.231.139.146]
huhti 29 13:51:23 ispcjessie postfix/smtpd[11226]: connect from unknown[103.231.139.146]
huhti 29 13:51:35 ispcjessie postfix/smtpd[11226]: warning: unknown[103.231.139.146]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
huhti 29 13:51:35 ispcjessie postfix/smtpd[11226]: disconnect from unknown[103.231.139.146]
huhti 29 13:52:06 ispcjessie postfix/smtpd[11233]: connect from unknown[103.231.139.127]
huhti 29 13:52:13 ispcjessie postfix/smtpd[11233]: warning: unknown[103.231.139.127]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
huhti 29 13:52:13 ispcjessie postfix/smtpd[11233]: disconnect from unknown[103.231.139.127]
huhti 29 13:52:42 ispcjessie postfix/smtpd[11226]: connect from unknown[103.231.139.127]
huhti 29 13:52:48 ispcjessie postfix/smtpd[11226]: warning: unknown[103.231.139.127]: SASL LOGIN authentication failed: UGFzc3dvcmQ6
huhti 29 13:52:49 ispcjessie postfix/smtpd[11226]: disconnect from unknown[103.231.139.127]

What is wrong and how to fix?

 

I'm pretty sure I did choose reconfigure services on Friday when updateing ISPConfig. But now I forced reconfigure services, and

Code:

# netstat -tap | grep -i amavis
tcp        0      0 localhost:10024         *:*                     LISTEN      13005/amavisd-new (
tcp        0      0 localhost:10026         *:*                     LISTEN      13005/amavisd-new (
tcp6       0      0 localhost:10024         [::]:*                  LISTEN      13005/amavisd-new (
tcp6       0      0 localhost:10026         [::]:*                  LISTEN      13005/amavisd-new (

Now mailq empties, after postqueue -f. I don't know why it stopped of friday.

 

I could not see any other errors in mail.log. The mails arrived at the host, but were put in deferred queue.