Google Workspace

Shared domains

Custom domains help establish trust with your recipients. We recommend configuring a dedicated domain or subdomain with AgentMail. However, sometimes you need to use your primary domain, which may already be managed by another email provider.

It is possible to use the same domain with both Google Workspace and AgentMail. This guide walks you through that configuration.

DNS records

The initial setup is the same as any domain: add the AgentMail DNS records. These records will not interfere with your existing Google Workspace setup.

Even after adding these records, AgentMail will not receive email sent to your domain by default. This is because the AgentMail MX record has a priority of 10, while Google’s MX record is typically set to 1 (lower numbers take higher priority).

Your MX records should look like this:

Google Workspace configuration

Next, navigate to the Google Workspace admin console. You will configure Gmail to route emails for unrecognized addresses to AgentMail.

In the left menu, navigate to Apps → Google Workspace → Gmail.

Configure host

First, add AgentMail as a mail host. This tells Gmail which server to route emails to.

In the Hosts section, click Add Route.

Configure the route with the following settings:

1. Set the name to AgentMail
2. Select Single host
3. Enter inbound-smtp.us-east-1.amazonaws.com for the host name
4. Enter 25 for the port
5. Check the recommended options
6. Click Save

Configure routing rule

Navigate back to the Gmail settings page and scroll to the Routing section at the bottom.

In the routing settings, click Add another rule.

Check Inbound and Internal - Receiving, then set the action to Modify message.

Scroll down and check All inactive and unrecognized accounts. Check Change route and select the AgentMail route from the dropdown.

Click Save to apply the rule. Emails sent to addresses that don’t belong to existing Gmail accounts will now be routed to AgentMail.