Any news on this?
I have configured my ZCS that it runs only in the LAN and uses an external MTA for sending and receiving Mails to the rest of the world.
The default domain here is called "internal.org" and the most ISPs are blocking mails from
user@internal.org when they came from the domain "external.org" (our external MTA).
To get mails to the outside, i configured every user account like described here:
https://www.zimbra.com/forums/133332-post9.html
If a user sends an external e-mail, ZCS now uses the from address "user@external.org" instead of "user@internal.org" as default so that the mails are not blocked by all the big ISPs.
But if he sets an away message, Zimbra does not use "user@external.org" for sending the email, thats why all of these mails are blocked.
So away messages are only working inside the LAN!
It would be great if you could choose where the away message is send from.
(Like personality A or personality B)