- New clients connecting with Mimecast using the Connect Application on an On Premise, Hybrid, or MSP Exchange. Users of Office 365 should refer to the Setting Up Your Email on an Office 365 page. If you are not using the Connect Application, click here.
- Customers using Mimecast for email security.
You'll need to prepare your environment to accept inbound emails that have been routed through us. This requires you to:
- Configure your environment to accept email from us.
- Specify the domains we need to route email to.
- Specify the domains' delivery route.
- Verify the connection.
To start preparing for inbound email:
- Click on the Gateway | Set Up Your Inbound Email menu item. The tasks mentioned above are listed.
- Click the Start button.
If you’ve created an "Everyone To Internal " delivery route policy using the Administration Console, an option is presented to use it, but for granularity we recommend you create new routes using the Connect App.
Configuring Your Environment to Accept Email From Mimecast
To avoid disruption to your email flow, you must set us up as your trusted email source. This is achieved by ensuring your environment is configured to receive inbound email from our data centers, as we process your inbound email before delivering it to your Exchange. Emails may be blocked unless this is completed successfully.
To configure your environment to accept email from us:
- Configure your firewall to accept SMTP traffic from the Mimecast IP ranges displayed in the application.
- Click the Next button.
- Route your inbound emails to the domains displayed in the application (see below).
Routing Email to Your Domains
This step lets us know where to deliver emails that are addressed to your validated domains. Your primary domain is displayed, but if you have validated other domains, email destined for these can also be routed to the same destination.
To route email to other domains:
- Select the domains to be routed. Your primary domain is automatically selected.
- Select any Additional Domains by either clicking the:
- Check Box to the left of the domain (see the image on the right).
- Select All link.
- Click the Next button.
- Specify the domain’s inbound email delivery route (see below).
Specifying the Domain's Delivery Route
To specify your domains' delivery routes:
- Complete the dialog for the Delivery Route as follows:
Field Description Hostname Enter the hostname or IP of the main delivery route to be used for inbound email. Port Specify the port used for SMTP email delivery. The default port is 25.
- Specify an Alternate Route as follows:
Field Description Hostname Enter the hostname or IP of the alternate delivery route to be used for inbound email. Port Specify the port used for SMTP email delivery. The default port is 25.
Although it is not required, we strongly recommend you provide an alternative route to ensure there is no break in your service.
- Click the button.
- Enter a valid I so we can verify your inbound route.
- Click the Finish button.
Verifying the Connection
We'll verify the Exchange mail flow connector by monitoring inbound email traffic. Additionally a delivery and routing definition policy is automatically created for each of your domains.
Inbound email is not routed via our gateway until you Modify your MX records.