Knowledgebase: outmail
How to setup a Mail Relay in Zimbra 8.5

Problem:

How to setup a Mail Relay in Zimbra 8.5?

Solution:

Follow the guide below to configure Zimbra 8.5 to use outMail as a Internet Mail Relay. For older versions of Zimbra please see the "How to setup a Mail Relay in Zimbra 8.0.0" article

This article already assumes your Zimbra system is able to send emails externally and that you are already have a terminal connection to your server with the necessary access rights to manage and administor zimbra.

First you need to create a password file for zimbra to use. create a file called /opt/zimbra/conf/relay_password and add the following lines to that file

mxXXXXXX.smtp-engine.com outMail-username:password

Once you have edited the file, a look file needs to be created

postmap /opt/zimbra/conf/relay_password

To enable zimbra to use the outMail service at the prompt type the following

zmprov ms server.domain.com zimbraMtaRelayHost mxXXXXXX.smtp-engine.com

zmprov ms server.domain.com zimbraMtaSmtpSaslPasswordMaps lmdb:/opt/zimbra/conf/relay_password
zmprov ms server.domain.com zimbraMtaSmtpSaslAuthEnable yes
zmprov ms server.domain.com zimbraMtaSmtpCnameOverridesServername no
zmlocalconfig -e postfix_smtp_use_tls=no
zmlocalconfig -e postfix_smtp_sasl_security_options=noanonymous zmprov ms server.domain.com zimbraMtaSmtpSaslSecurityOptions noanonymous postconf -e smtp_sasl_mechanism_filter=plain,login postmap /etc/postfix/relay_passwd

To enable zimbra to use the outMail with a different SMTP port use the following command line

zmprov ms server.domain.com zimbraMtaRelayHost mxXXXXXX.smtp-engine.com:587

For the above changes to take effect the zimbra service will need restarting (postix reload)

Summary of server details

Outgoing server

mxXXXXXX.smtp-engine.com

As provided in your signup email

Outgoing server protocol

SMTP

Outgoing server port

25, 587, 2525 or 8025

Authentication Type

Basic Authentication

Username

As provided

Password

As provided

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