SOLUTION:
-----------
1) MTA Dummy Package
"To install mailx without additional postfix" use "mta-dummy" package
e.g.
• wget
http://ubuntu.lnix.net/misc/mta-dumm...my_1.0_all.deb
• dpkg -i mta-dummy_1.0_all.deb
Please check my further posts or google for it. It allows installing packages by resolve mailer dependencies.
2) Use apt-get to install the 'mailx' package.
3) Edit /etc/mail.rc to add the following:
set sendmail=/opt/zimbra/postfix/sbin/sendmail
4) ) Install Logwatch
• apt-get install logwatch
Tested mail by CLI & logwatch - OK!
Big THANKS for the great support of Sean Gallagher from Zimbra Network Support Team
RESOLVED, everything works fine.
Cheers
Christian