I have a multi server setup with 1 ldap server, 1 mailbox server and 1 server with MTA and Proxy installed.
Under the MTA tab in global settings I set the "Relay MTA for external delivery" to the correct server. If I do a "zmprov gcf zimbraMtaRelayHost" I get the correct value. If I check the MTA tab on my MTA server I see the same setting.
When I try to send a message out of my environment I tail the maillog and I see the MTA server attempt to connect to the email recipient's domain instead of connecting to the Relay MTA.
Why isn't the MTA server picking up this setting?