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This guide walks you through configuring IceWarp to relay all outbound mail through MailChannels Outbound Filtering.

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Prerequisites

  • Access to the IceWarp administration interface
  • Your MailChannels SMTP username and password

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Configure the relay

1

Set the relay server

In the IceWarp administration interface, navigate to Mail > General > Delivery and enable Use Relay Server.Enter the following in the relay server field, replacing the placeholders with your actual MailChannels credentials:
<MailChannelsUsername>:<MailChannelsPassword>@smtp.mailchannels.net:25
IceWarp relay server configuration
2

Add the X-AuthUser header

MailChannels uses the X-AuthUser header to identify the authenticated sender. Messages without this header are treated as forwarded mail and subject to different policies.Navigate to Mail > Rules and click Add. Configure the rule as follows:
FieldValue
ConditionsAll messages
ActionsEdit message header
HeaderX-AuthUser:
Value%%auth_email%%
Enable the rule and click Apply.IceWarp X-AuthUser rule configuration