> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mailchannels.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Setup Lotus Domino

> Configure Lotus Domino to relay outbound mail through MailChannels Outbound Filtering using SMTP authentication and smart host routing.

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

## Prerequisites

* Access to **Domino Administrator**
* Your MailChannels SMTP username and password

## Configure the relay

<Steps>
  <Step title="Open the server configuration">
    Open **Domino Administrator**, click **Administration**, and select the **Configuration** tab. Click **Configurations**, then double-click the name of your Domino server.
  </Step>

  <Step title="Set the relay host">
    At the top of the window, click **Edit Server Configuration**. Select the **Router/SMTP** tab in the first row (this also selects the **Basics** tab in the second row).

    Under **Relay host for messages leaving the local internet domain**, enter:

    ```
    smtp.mailchannels.net
    ```
  </Step>

  <Step title="Enable SMTP authentication">
    In the **Use authentication when sending messages to the relay host** field, select:

    **Required**

    This checks whether the server can authenticate. If the server cannot authenticate, no attempt is made to try a non-authenticated session.

    Enter your MailChannels credentials:

    | Field        | Value                           |
    | ------------ | ------------------------------- |
    | **Name**     | Your MailChannels SMTP username |
    | **Password** | Your MailChannels SMTP password |
  </Step>

  <Step title="Set the transfer retry interval">
    Select the **Restrictions and Controls** tab from the second row, then the **Transfer Controls** tab from the third row.

    Set **Initial Transfer Retry Interval** to `1 minute` or higher.
  </Step>

  <Step title="Save and test">
    Click **Save & Close** to apply the configuration. Send a test message to confirm that outbound mail is relaying through MailChannels as expected.
  </Step>
</Steps>