[root@nethserver ~]# yum history pkg-info dovecot
Loaded plugins: changelog, fastestmirror, nethserver_events
Transaction ID : 133
Begin time : Tue Dec 4 08:15:25 2018
Package : dovecot-1:2.2.10-8.el7.x86_64
State : Updated
Size : 10,249,846
Build host : c1bm.rdu2.centos.org
Build time : Thu Aug 3 08:52:54 2017
Packager : CentOS BuildSystem http://bugs.centos.org
Vendor : CentOS
License : MIT and LGPLv2
URL : http://www.dovecot.org/
Source RPM : dovecot-2.2.10-8.el7.src.rpm
Commit Time : Tue Mar 21 13:00:00 2017
Committer : Michal Hlavinka mhlavink@redhat.com
Reason : dep
From repo : base
Installed by : System
Transaction ID : 133
Begin time : Tue Dec 4 08:15:25 2018
Package : dovecot-1:2.2.36-3.el7.x86_64
State : Update
Size : 14,868,869
Build host : x86-01.bsys.centos.org
Build time : Wed Oct 31 01:24:57 2018
Packager : CentOS BuildSystem http://bugs.centos.org
Vendor : CentOS
License : MIT and LGPLv2
URL : http://www.dovecot.org/
Source RPM : dovecot-2.2.36-3.el7.src.rpm
Commit Time : Wed Sep 19 14:00:00 2018
Committer : Michal Hlavinka mhlavink@redhat.com
Reason : dep
From repo : base
Installed by : System
Changed by : root
Transaction ID : 3
Begin time : Wed Nov 15 20:53:59 2017
Package : dovecot-1:2.2.10-8.el7.x86_64
State : Dep-Install
Size : 10,249,846
Build host : c1bm.rdu2.centos.org
Build time : Thu Aug 3 08:52:54 2017
Packager : CentOS BuildSystem http://bugs.centos.org
Vendor : CentOS
License : MIT and LGPLv2
URL : http://www.dovecot.org/
Source RPM : dovecot-2.2.10-8.el7.src.rpm
Commit Time : Tue Mar 21 13:00:00 2017
Committer : Michal Hlavinka mhlavink@redhat.com
Reason : dep
From repo : base
Installed by : System
history pkg-info
[root@nethserver ~]# grep NsReleaseLock /var/log/messages
Dec 4 08:21:21 nethserver /sbin/e-smith/db[81454]: /var/lib/nethserver/db/configuration: OLD sysconfig=configuration|Copyright||DefaultLanguage|en_US.utf8|NsReleaseLock|disabled|ProductName|NethServer|Release|final|Version|7.5.1804|ZeroConf|enabled
Dec 4 08:21:21 nethserver /sbin/e-smith/db[81454]: /var/lib/nethserver/db/configuration: NEW sysconfig=configuration|Copyright||DefaultLanguage|en_US.utf8|NsReleaseLock|enabled|ProductName|NethServer|Release|final|Version|7.5.1804|ZeroConf|enabled
Dec 4 09:43:49 nethserver /sbin/e-smith/db[15021]: /var/lib/nethserver/db/configuration: OLD sysconfig=configuration|Copyright||DefaultLanguage|en_US.utf8|NsReleaseLock|enabled|ProductName|NethServer|Release|final|Version|7.5.1804|ZeroConf|enabled
Dec 4 09:43:49 nethserver /sbin/e-smith/db[15021]: /var/lib/nethserver/db/configuration: NEW sysconfig=configuration|Copyright||DefaultLanguage|en_US.utf8|NsReleaseLock|disabled|ProductName|NethServer|Release|final|Version|7.5.1804|ZeroConf|enabled
Dec 4 09:50:21 nethserver /sbin/e-smith/db[16503]: /var/lib/nethserver/db/configuration: OLD sysconfig=configuration|Copyright||DefaultLanguage|en_US.utf8|NsReleaseLock|disabled|ProductName|NethServer|Release|final|Version|7.5.1804|ZeroConf|enabled
Dec 4 09:50:21 nethserver /sbin/e-smith/db[16503]: /var/lib/nethserver/db/configuration: NEW sysconfig=configuration|Copyright||DefaultLanguage|en_US.utf8|NsReleaseLock|enabled|ProductName|NethServer|Release|final|Version|7.5.1804|ZeroConf|enabled
yum history pkg-info dovecot
Loaded plugins: changelog, fastestmirror, nethserver_events
Transaction ID : 56
Begin time : Tue Dec 4 03:53:52 2018
Package : dovecot-1:2.2.10-8.el7.x86_64
State : Updated
Size : 10,249,846
Build host : c1bm.rdu2.centos.org
Build time : Thu Aug 3 08:52:54 2017
Packager : CentOS BuildSystem <http://bugs.centos.org>
Vendor : CentOS
License : MIT and LGPLv2
URL : http://www.dovecot.org/
Source RPM : dovecot-2.2.10-8.el7.src.rpm
Commit Time : Tue Mar 21 13:00:00 2017
Committer : Michal Hlavinka <mhlavink@redhat.com>
Reason : dep
From repo : base
Installed by : System <unset>
Transaction ID : 56
Begin time : Tue Dec 4 03:53:52 2018
Package : dovecot-1:2.2.36-3.el7.x86_64
State : Update
Size : 14,868,869
Build host : x86-01.bsys.centos.org
Build time : Wed Oct 31 01:24:57 2018
Packager : CentOS BuildSystem <http://bugs.centos.org>
Vendor : CentOS
License : MIT and LGPLv2
URL : http://www.dovecot.org/
Source RPM : dovecot-2.2.36-3.el7.src.rpm
Commit Time : Wed Sep 19 14:00:00 2018
Committer : Michal Hlavinka <mhlavink@redhat.com>
Reason : dep
From repo : base
Installed by : System <unset>
Changed by : root <root>
Transaction ID : 3
Begin time : Fri Feb 2 10:53:23 2018
Package : dovecot-1:2.2.10-8.el7.x86_64
State : Dep-Install
Size : 10,249,846
Build host : c1bm.rdu2.centos.org
Build time : Thu Aug 3 08:52:54 2017
Packager : CentOS BuildSystem <http://bugs.centos.org>
Vendor : CentOS
License : MIT and LGPLv2
URL : http://www.dovecot.org/
Source RPM : dovecot-2.2.10-8.el7.src.rpm
Commit Time : Tue Mar 21 13:00:00 2017
Committer : Michal Hlavinka <mhlavink@redhat.com>
Reason : dep
From repo : base
Installed by : System <unset>
history pkg-info
Now I have another problem.
I have all the emails in the queue and NethServer can not send them
This problem was born after I deactivated the antispam plugin
You may also have to deactivate the anti spam filter rules (I did so some time ago). You can do this in the web interface under Configuration / Email / Filter.