ldap server and client conflicts, with Postfix and Courier in the mix

[Pollywog]

I want to install the LDAP server but it complains that it conflicts with LDAP 
client:

===>  openldap-server-2.3.37 conflicts with installed package(s):
      openldap-client-2.3.37

However, attempting to remove the client to make room for the server results 
in another complaint:

pkg_delete: package 'openldap-client-2.3.37' is required by these other 
packages
and may not be deinstalled:
courier-authlib-ldap-0.59.3
postfix-2.4.5,1


What can I do?