i update kolab16 on my centos 7.5
yum update
after that the kolabd service is started with such message:
```
systemctl status kolabd
● kolabd.service - Kolab Groupware Server.
Loaded: loaded (/usr/lib/systemd/system/kolabd.service; enabled; vendor preset: disabled)
Active: active (running) since Wed 2018-10-10 21:38:27 MSK; 6s ago
Process: 12899 ExecStop=/bin/kill -TERM $MAINPID (code=exited, status=0/SUCCESS)
Process: 12902 ExecStart=/usr/sbin/kolabd $FLAGS --pid-file /run/kolabd/kolabd.pid (code=exited, status=0/SUCCESS)
Main PID: 12904 (kolabd)
CGroup: /system.slice/kolabd.service
├─12904 /usr/bin/python /usr/sbin/kolabd --fork -l warning --pid-file /run/kolabd/kolabd.pid
└─12905 /usr/bin/python /usr/sbin/kolabd --fork -l warning --pid-file /run/kolabd/kolabd.pid
Oct 10 21:38:26 mail systemd[1]: Starting Kolab Groupware Server....
Oct 10 21:38:27 mail systemd[1]: kolabd.service: Supervising process 12904 which is not our child. We'll most likely not notice when it exits.
Oct 10 21:38:27 mail systemd[1]: Started Kolab Groupware Server..
```
```
netstat -apn | grep 10026
no ports
```
```
ps aux | grep wallaced
no service
```
```
export USER=kolab; /usr/bin/python /usr/sbin/wallaced -l warning --pid-file /run/wallaced/wallaced.pid
2018-10-10 21:43:51,268 pykolab.wallace WARNING [13052] No contents configured for footer module
Traceback (most recent call last):
File "/usr/lib/python2.7/site-packages/wallace/__init__.py", line 480, in run
self.do_wallace()
File "/usr/lib/python2.7/site-packages/wallace/__init__.py", line 203, in do_wallace
self.pickup_spool_messages(sync=True)
File "/usr/lib/python2.7/site-packages/wallace/__init__.py", line 333, in pickup_spool_messages
pickup_message(filepath, self.modules, module=module, stage=stage)
File "/usr/lib/python2.7/site-packages/wallace/__init__.py", line 81, in pickup_message
cb_action_ACCEPT('wallace', filepath)
File "/usr/lib/python2.7/site-packages/wallace/modules.py", line 333, in cb_action_ACCEPT
message = Parser().parse(open(filepath, 'r'), True)
IOError: [Errno 2] No such file or directory: '/var/spool/pykolab/wallace/footer/incoming/tmp9judaN'
Traceback occurred, please report a bug at https://issues.kolab.org
```
```
systemctl status postfix
Oct 10 21:49:54 mail postfix/error[13910]: 4756D13CFDA: to=<>, relay=none, delay=8877, delays=8873/3.5/0/...refused)
Oct 10 21:49:54 mail postfix/error[13880]: 4550A197830: to=<>, relay=none, delay=340744, delays=340740/3.5/0/0....refused)
Oct 10 21:49:54 mail postfix/error[13133]: 4B82113AD04: to=<>, relay=none, delay=12780, delays=12776/3.5...refused)
Oct 10 21:49:54 mail postfix/error[13894]: 459B7177224: to=<>, relay=none, delay=427404, delays=427400/3.5/0/0....refused)
Oct 10 21:49:54 mail postfix/error[13883]: 4B60D177022: to=<>, relay=none, delay=7184, delays=7180/3.5/0/0.07, d...refused)
```
| delivery temporarily suspended: connect to 127.0.0.1[127.0.0.1]:10026: Connection refused
what fix it?