multidomain - can send emails to secondary domains but not to the primary

[Jan Kowalsky]

Hi all,

(kolab 3.2, debian wheezy)

after setting up multidomain support in kolab 3.2 according to 
https://docs.kolab.org/howtos/multi-domain.html I have the following 
situation:

Assume we have the primary domain: example.org
and two added: example2.org, example3.org

I can send emails to user at example2.org and user at example3.org but not to 
user at example.org anymore.

The error is: 

Mar 24 22:27:14 kolab3 postfix/submission/smtpd[7208]: NOQUEUE: reject: RCPT 
from localhost[127.0.0.1]: 550 5.1.1 <user at example.org>: Recipient address 
rejected: User unknown in local recipient table; from=<user at example2.org> 
to=<user at example.org> proto=ESMTP helo=<kolab3>

and in ldap access log I get:

conn=5 op=44 SRCH base="dc=datenkollektiv,dc=net" scope=2 filter="(&(|
(mail=user at user@example.org)(alias=user at user@example.org))(!
(nsUniqueId=d10b7401-b39311e3-943cf169-810dacce)))" attrs="mail alias 
nsUniqueId"
[24/Mar/2014:21:36:21 +0100] conn=5 op=44 RESULT err=0 tag=101 nentries=0 
etime=0 notes=U

it's filterd with nsUniqueID - and this is obviously the reason that the entry 
is not found.

Searching with this ldap filter manually I also did not get any result. Without 
the nsUniqueID-Attribute the user is found.

Has anybody an explanation?

(Before setting up multidomain it was possible to send to example.org)

Best Regards
Jan