zimbra@mail ~]$ zmprov gs mail.example.com | grep -i mta
zimbraMtaAntiSpamLockMethod: flock
zimbraMtaAuthEnabled: TRUE
zimbraMtaAuthHost: mail.example.com
zimbraMtaAuthTarget: TRUE
zimbraMtaAuthURL:
http://mail.example.com :8100/service/soap/
zimbraMtaDnsLookupsEnabled: TRUE
zimbraMtaMyDestination: localhost
zimbraMtaMyNetworks: 127.0.0.0/8 <mail server network>/24
zimbraMtaTlsAuthOnly: FALSE
aW9uIFN1aXRlMRgwFgYDVQQDEw90Y3MtaXRvbnRhcC5jb20wHh cNMDkwNzA3MTA1
OTA1WhcNMTAwNzA3MTA1OTA1WjB/MQswCQYDVQQGEwJVUzEMMAoGA1UECBMDTi9B
zimbraServiceEnabled: mta
zimbraServiceInstalled: mta
[zimbra@mail ~]$
I have found tht when tried to checked MTA config as above.