Kolab 16: Problems after Update

[gu471]

Roland Kolb (IBU <roland.kolb <at> ib-ulherr.de> writes:

>       since the last update (4 Jul 2016) I can't send any mails from my
>       Kolab-Server (Kolab 16 on Centos 7). My postfix-Version is:
>       postfix.x86_64 2:2.10.1-6.el7   
>       When I try to send a mail from the web client I found the
>       following message in maillog:  reject: DATA from localhost[::1]:
>       554 5.7.1 <DATA>: Data command rejected: Sender access
>       denied;

After the latest update I've got the same issue.

it should have to do with the following line in my config:

main.cf:
  #> submission_data_restrictions = check_policy_service 
unix:private/submission_policy

master.cf:
  submission    inet    n - n	- - smtpd
    -o cleanup_service_name=cleanup_submission
    -o syslog_name=postfix/submission
    -o smtpd_tls_security_level=encrypt
    -o smtpd_sasl_auth_enable=yes
    -o smtpd_sasl_authenticated_header=yes
    -o smtpd_client_restrictions=permit_sasl_authenticated,reject
    #> -o smtpd_data_restrictions=$submission_data_restrictions
    -o smtpd_recipient_restrictions=$submission_recipient_restrictions
    -o smtpd_sender_restrictions=$submission_sender_restrictions

Commenting these lines out, the problem neither exist. But everybody trying 
to send a mail from a mail address of my domain can send a mail, even with 
invalid credentials.
Might it be a security issue or depends it on my other settings?

Three cheers for snapshots, but hopefully waiting for a fix.