Setting up Zimbra with MailChannels

Prerequisites
Step 1: Configure Zimbra to Route Outbound Emails via MailChannels
Step 2: Configure Zimbra to Handle Incoming Emails
Step 3: Add X-AuthUser Headers
Optimizations, Resources and Best Practices

Prerequisites

• Administrative access to your Zimbra server
• An active subscription to MailChannels and your SMTP Username & Password(Host Console)

Step 1: Configure Zimbra to Route Outbound Emails via MailChannels

1. Log in to the Zimbra Admin Console:

• Navigate to https://<your-zimbra-server>:7071
• Log in with your admin credentials

2. Configure Outbound Mail Server:

• Go to Configure > Global Settings
• Select the MTA tab
• Under Relay MTA for external delivery, enter smtp.mailchannels.net
• Set SMTP Port to 587
• Enable TLS encryption
• Enter your MailChannels SMTP username and password into the Relay Authentication Username and Relay Authentication Password fields
• Save the changes

Step 2: Configure Zimbra to Handle Incoming Emails

MailChannels Inbound Filtering requires an active Inbound subscription before use. See the Inbound tab in your Host Console for details. With an active Inbound Filtering subscription, use the following guides to configure your users and domains: MailChannels Inbound Filtering

Step 3: Add X-AuthUser Headers

• Setting up the Authenticated User Header with Zimbra

Optimizations, Resources and Best Practices

• Zimbra Admin Guide - Zimbra Mail Transfer Agent