Connect Application: Preparing for Inbound Email

Document created by user.oxriBaJeN4 Employee on Oct 22, 2015Last modified by user.oxriBaJeN4 Employee on Jul 20, 2018
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Applies To

 

Connect_Routing_Inbound.png

  • New clients connecting with Mimecast using the Connect Application. If you are not using the Connect Application, click here.
  • Customers who are using Mimecast for email security.

 

Walkthrough

 

You'll need to prepare your Exchange to accept inbound emails that have been routed through us. Before preparing your inbound email, the following steps must be completed:

 

To prepare your inbound email:

  1. Click on the Gateway | Prepare for Inbound Email menu item.
  2. Click on the Start button.
  3. Configure your Exchange to accept inbound emails through us. The process for doing this depends on the Exchange type:
Before inbound email can be routed through us, you must also modify your MX records. This step designates us as the mail service responsible for accepting email on your behalf. Read the Modifying Your MX Records page for further details.

Office 365

 

To prepare Office 365 to accept inbound mail that has been routed through us:

  1. Configure Office 365 to accept inbound email from us, by setting the IP addresses displayed in the application as a trusted source.
    See the Bypassing Spam Checks section of the Inbound Delivery Routing page for further details.
  2. Determine your Office 365 inbound mail flow hostname:
    1. Log on to the Office 365 Admin Center.
    2. Click on the Manage | Domains menu item on the left hand side.
    3. Select your Domain.
    4. Click on the Domain Settings link on the right hand side. The DNS Management dialog displays.
    5. Make a note of the hostname displayed.
  3. Click the Next button to proceed.
  4. Enter your Office 365 inbound mail flow hostname in the Hostname field.
  5. Click the Verify Route button. The Test Inbound Host dialog displays.
  6. Test Inbound HostEnter a valid Internal Email Address so we can verify your inbound route.
  7. Click on the Test button. A green tick displays if the route is successful.
  8. When you're ready, click the Finish button. A summary page of your inbound email connection displays.
If you’ve created an "Everyone To Internal " delivery route policy using the Administration Console, an option is presented to use it rather than create a new one.

On Premise / Hybrid / Hosted Exchange

 

To prepare your Exchange to accept inbound email that has been routed through us, read the Preparing for Inbound Email page.

 

G Suite


Follow the tasks below to prepare G Suite to accept inbound mail that has been routed through us.

Adding Mimecast to Your Email Whitelist


To bypass spam scanning, add our IP ranges to your email whitelist:

  1. Log on to the Google Admin Console.
  2. Navigate to the Apps | G Suite | Gmail | Advanced Settings menu item.
  3. Highlight your top-level Domain in the Organizations section.
  4. Navigate to your Email Whitelist.
  5. Add the Mimecast Data Center IP for your Mimecast account region, separating the entries with commas. Our Inbound IP Ranges display in the Connect Application. See the Mimecast Data Centers and URLs page for full details.
  6. Click on the Save button.

View the Whitelist IP addresses in Gmail page in the Google Help section for further details.

 

Adding Mimecast to Your Inbound Gateway


To secure your mail flow, add our IP ranges to your inbound gateway:

  1. Require TLSNavigate to Inbound Gateway.
  2. Click on the Configure button.
  3. Enter "Mimecast Gateway" in the Short description.
  4. Use the Add button to enter the Mimecast Data Center IP for your Mimecast account region. Our Inbound IP Ranges display in the Connect Application. See the Mimecast Data Centers and URLs page for full details.
  5. Select the Require TLS for Connections From the Email Gateways Listed Above option. Ensure the other two options are left unchecked.
  6. Click on the Add Setting button to save the configuration.

View the Set up an inbound mail gateway page of the Google help for further details.

 

Setting the Inbound Delivery Route


After Mimecast is added to your email whitelist and inbound gateway, you'll need to set the Inbound Delivery Route in the Connect Application:

  1. Click on the Next button to proceed to the Inbound Delivery Route step.
  2. Click the Verify Route button. The Test Inbound Host dialog displays.
  3. Enter a valid internal email address, so we can verify your inbound route.
  4. Click on the Test button. A green tick displays if the route is successful.
  5. When you're ready, click the Finish button. A summary page of your inbound email connection displays.

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