At the server I installed openldap-server, at this computer open-ldap client has already been installed. Version of openldap-client (2.4.16) was older then new openldap-server (2.4.21) and the version of client has updated too. OpenLDAP-client works with postfix on this server and after all updates postfix cann't start again. The error when postfix stop|start is:

/libexec/ld-elf.so.1: Shared object "libldap-2.4.so.6" not found, required by "postfix"

At the category with libraries is libldap-2.4.so.7, but libldap-2.4.so.6 is removed from the server. When I want to deinstall curently version of openldap-client, system write

===>  Deinstalling for net/openldap24-client 

O.K., but when I start "make install" system write:
===>  Installing for openldap-sasl-client-2.4.23
===>   openldap-sasl-client-2.4.23 depends on shared library: sasl2.2 - found
===>   Generating temporary packing list
===>  Checking if net/openldap24-client already installed
===>   An older version of net/openldap24-client is already installed (openldap-client-2.4.21)
      You may wish to ``make deinstall'' and install this port again
      by ``make reinstall'' to upgrade it properly.
      If you really wish to overwrite the old port of net/openldap24-client
      without deleting it first, set the variable "FORCE_PKG_REGISTER"
      in your environment or the "make install" command line.
*** Error code 1

Stop in /usr/ports/net/openldap24-client.
*** Error code 1

Stop in /usr/ports/net/openldap24-client.

Updating of ports doesn't help, and postfix writes error:

/libexec/ld-elf.so.1: Shared object "libldap-2.4.so.6" not found, required by "postfix"