Zimbra Relay Host Integration: zimbraMtaRelayHost Guide
Pitbull relay host configuration on Zimbra mail server: step-by-step relayhost, SASL auth and MX gateway via zmprov CLI.
Zimbra is a widely used enterprise email and groupware platform. It uses Postfix MTA underneath and relay configuration is done via the zmprov CLI.
zimbraMtaRelayHost Configuration
su - zimbra
zmprov ms $(zmhostname) zimbraMtaRelayHost relay.pitbull.com.tr:587
zmprov ms $(zmhostname) zimbraMtaSmtpSaslAuthEnable yes
zmprov ms $(zmhostname) zimbraMtaSmtpSaslPasswordMaps lmdb:/opt/zimbra/conf/relay_passwordSASL Password File
# /opt/zimbra/conf/relay_password
relay.pitbull.com.tr tenant@pitbull.com.tr:RELAY_TOKEN
postmap /opt/zimbra/conf/relay_password
zmcontrol restartInbound MX Gateway
Point DNS MX records to the Pitbull gateway. All inbound traffic passes through Rspamd, DMARC and ClamAV checks before reaching Zimbra.
Multi-Server Zimbra
If there are multiple Zimbra MTA nodes, run zmprov ms separately for each. Alternatively, use zmprov mcf to change global config.
Conclusion
Zimbra + Pitbull integration delivers centralized security, quarantine and NOC visibility for enterprise email infrastructure.
