Exchange - SMTP Connector - Microsoft Exchange 2019 / 2016

This article contains information on configuring an SMTP Connector for Microsoft Exchange to route outbound emails through Mimecast, including adding authorized IPs, setting smart hosts, verifying connections, and disabling old connectors.

One of the Mimecast implementation steps is to direct all outbound emails via Mimecast. This requires an SMTP Connector to be configured on your Exchange Server. Prior to Mimecast accepting outbound emails, the Authorized IP Address where emails will be sent must be added to your Mimecast account.

Setting Up an SMTP Connector

To set up an SMTP Connector, follow the steps on Microsoft's website, depending on your Exchange:

When prompted in the Microsoft guide, select the Route mail through smart hosts option and then click + Add. In the Add smart host dialog that displays, enter the Mimecast outbound smart host for your region as listed below:

Field / Option Description
Europe (Excluding Germany) eu-smtp-outbound-1.mimecast.com
eu-smtp-outbound-2.mimecast.com
Germany de-smtp-outbound-1.mimecast.com
de-smtp-outbound-2.mimecast.com
United States of America us-smtp-outbound-1.mimecast.com
us-smtp-outbound-2.mimecast.com
USB  usb-smtp-outbound-1.mimecast.com
usb-smtp-outbound-2.mimecast.com
Canada ca-smtp-outbound-1.mimecast.com
ca-smtp-outbound-2.mimecast.com
South Africa za-smtp-outbound-1.mimecast.co.za
za-smtp-outbound-2.mimecast.co.za
Australia au-smtp-outbound-1.mimecast.com
au-smtp-outbound-2.mimecast.com
Offshore je-smtp-outbound-1.mimecast-offshore.com
je-smtp-outbound-2.mimecast-offshore.com

Disable or remove any other Outbound Send Connectors that were previously used. Failure to do this means your outbound email will still use these older send connectors and will not be routed through Mimecast. Any send connectors used for other purposes (e.g., archiving) may still be required to be enabled. If in doubt, consult your Mimecast Support engineer.

Verifying the Connection

You can confirm that outbound mail is flowing, by using the following steps:

  1. Send an outbound email to an external email address.
  2. Log on to the Mimecast Administration Console.
  3. Navigate to Message Center | Accepted Messages.
  4. Refresh the screen until you can see the details of the test email you have sent.

Next Steps

Once outbound emails are successfully routing through Mimecast, proceed to the next steps of the Connect process:

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