Hi there, I got a simple but really stupid prob with my new installation of Zimbra 8.0 on ubuntu 12.04.

I tried to install Postgrey, same as on my Centos 5.5 with Zimbra 7.2.1.... started from 5.X . But I cant use it this way. APT would install postfix, so what, doesnt matter, but it would also remove my zimbramta server !!!

Code:
apt-get install postgrey
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libberkeleydb-perl libdigest-hmac-perl libio-multiplex-perl libio-socket-inet6-perl libnet-cidr-perl libnet-dns-perl libnet-ip-perl libnet-rblclient-perl
  libnet-server-perl libparse-syslog-perl libsocket6-perl postfix
Suggested packages:
  libio-socket-ssl-perl libnet-ssleay-perl postfix-mysql postfix-pgsql postfix-ldap postfix-pcre libsasl2-modules dovecot-common resolvconf postfix-cdb
  mail-reader ufw postfix-doc
The following packages will be REMOVED:
  zimbra-mta
The following NEW packages will be installed:
  libberkeleydb-perl libdigest-hmac-perl libio-multiplex-perl libio-socket-inet6-perl libnet-cidr-perl libnet-dns-perl libnet-ip-perl libnet-rblclient-perl
  libnet-server-perl libparse-syslog-perl libsocket6-perl postfix postgrey
0 upgraded, 13 newly installed, 1 to remove and 0 not upgraded.
Need to get 2086 kB of archives.
After this operation, 5979 kB of additional disk space will be used.
Do you want to continue [Y/n]?
Is there any solution for this? - Yes I am using RBLs, thats ok, but I would further use postgrey.

Thanks a lot

Centro