I would like to setup Zimbra as Primary server..
I did it with Webadmin -> Server settings -> Relay MTA -> smtp.domain.com:25
It is working for emails from internet (MTA).
- I log in as existing account on Primary Zimbra email@example.com
- write email to the account firstname.lastname@example.org - not existing account on primary zimbra, but existing on secondary (relay mta) smtp server
- Undeliverable (from LMTP)
How can I fix this for the working communication between accounts email@example.com and firstname.lastname@example.org ?
Or is it possible to disable LMTP and use only MTA? What is the solution for this (I think) typical request?