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Prolateral offers primary and backup domain (DNS) services, with servers in key geographic locations providing the best service possible.

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, 465, 587, 2525 or 8025

Authentication Type

Basic Authentication, SSL and TLS supported

Username

As provided

Password

As provided

Looking for an outgoing #SMTP server?

outMail is an outbound #SMTP Server.

  • Supports SMTP & API protocols for sending emails.
  • Support for SMTP ports and alternative ports.
  • Authenticated SMTP
  • Support for SPF & DKIM
  • Easy setup
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Disclaimer

The Origin of this information may be internal or external to Prolateral Consulting Ltd. Prolateral makes all reasonable efforts to verify this information. However, the information provided in this document is for your information only. Prolateral makes no explicit or implied claims to the validity of this information. Any trademarks referenced in this document are the property of their respective owners.