in the last days I was testing UCS and some apps. I installed a master with Kopano and another server as UCS member with the mail and horde apps. Mails are retrieved via fetchmail.
I was playing around with the Mail Home Server option to get the mails for one user to the mail/horde system and it was not working. The reason was that ldap:/etc/postfix/ldap.transport was missing in the postfix main.cf. I added it and everything worked as expected.
Yesterday I upgraded the system to UCS 4.3 and the same problem appeared. The option for transport_maps was missing. Somehow (maybe during the Kopano installation?) the ldap entry is removed and breaks the Mail Home function. Bug or Feature?