[ECB]

All servers in our design are LDAP replicas. Thought that was a given, my mistake.

Originally Posted by Klug

But unable to send mail (even to each others) unless there's a MTA + LDAP (replica).

But if the non-MTAed servers have a direct connection to the MTA servers, can't they send mail to each other through the MTAs?

Originally Posted by Klug

As long as "remote directory" stays local the office.

You've lost me there - is it, or is it not possible to back up to a remote directory? I'm new to Linux, so be gentle...

Originally Posted by Klug

That was perdition, that was in 4.x ZCS...
zimbra-proxy is now nginx and proxies http(s), pop3(s) and imap4(s).

So to cut a long story short, the answer to my original question is YES.

Originally Posted by Klug

As soon as you've setup these, you've lost local access (ie direct access to the maibox server, not through the proxy) for some features (listed in my previous post).

Thanks for the tip.

Originally Posted by Klug

There are way arround this (using local zimbra-proxy with local DNS records) but it's quite complex (and goes against the initial simple idea).

I don't care if it's complex as long as I can make it work.

Originally Posted by Klug

I also guess the "internet" access to user account will be only be very low and not frequent.

That is correct.