Connect Application: Setting Up Your Outbound Email

Document created by user.oxriBaJeN4 Employee on Oct 22, 2015Last modified by user.oxriBaJeN4 Employee on Mar 12, 2018
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outb.pngApplies To...

 

  • 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.

 

Overview

 

Routing your email starts with the outbound email for your validated internal domains. This allows us to build a list of your trusted senders, by monitoring who you send email to over several days.

 

Before setting up your outbound email, the following steps should be completed:


To set up your outbound email:

  1. Log on to the Connect Application.
  2. Navigate to the Platform | Set Up Your Outbound Email menu item, and click Start.
  3. Update the SPF records for your domain. This is an external task. Follow the instructions below according to your Exchange type.
  4. Validate your SPF record in the Connect Application. This is a recommended optional step.
  5. Create an outbound Email Flow Connector to route your outbound mail through us. This is an external task. Follow the instructions below according to your Exchange type.

     You must have an administrator account to your Exchange with permissions to create a mail flow connector.

    Office 365 / Hosted Exchange

     

    To configure your Office 365 / Hosted Exchange to route outbound emails through us:

    1. Update the SPF records for your domains with the information displayed in the application under SPF Record, as shown below:
      SPF Record
      Only use the SPF record displayed in the application for your domains, as there are regional differences (i.e. "eu" for Europe in the above example). If you're not the person responsible for this task, click the Share link to send an email containing the required detail to someone who is.
      1. Log on to your Domain Registrar.
      2. Update / replace each domain’s SPF record to specify us as the authorized outbound service.
      3. If all email for your domains will be routed via us, remove all previous SPF records.
      4. Other outbound sources for your domain may require a combined SPF record. In this instance, ensure you include the Mimecast "xx_netblocks.mimecast.com" entry before creating a mail flow connector. To determine what "xx" is, refer to step 1 above.
        See the "Implementing SPF for Outbound Email Delivery" section in the Configuring DNS Authentication Definitions and Policies page, and the Implementing SPF for Outbound Email Delivery page for additional information.
    2. Optionally test your SPF record:
      1. Navigate to Platform | Set Up Your Outbound Email in the Connect Application.
      2. Select your domain from the Record to Validate drop down menu.
      3. Click on the Validate button. One of the following messages will display:
        • A green tick confirms the SPF record is valid.
        • A red exclamation confirms the SPF record is invalid.
      4. Click on the More or Less links to view further information about the SPF record and toggle the display.
        This step performs a TXT record lookup and validates the SPF record entry. You can have more than one mechanism (IP/Host), but Mimecast must be the first one listed.
    3. Create an outbound Email Flow Connector:
      1. Log on to the Office 365 Exchange Management Portal.
      2. Create a mail flow connector. Read the Creating an Outbound Email Flow Connector page for further details.
      3. Ensure that all outbound emails are routed via the Mimecast smart hosts listed in Connect.
    4. Click the Confirm button in Connect to verify the connector. If validation is successful, a summary page of your outbound email connection displays.

    On Premise / Hybrid

     

    To configure your On Premise / Hybrid Exchange to route outbound emails through us:

    1. Confirm your outbound IP addresses. This ensures we deliver only legitimate email from your organization.
      1. Check that the outbound IP addresses displayed in the application are correct.
        If the outbound IP addresses are incorrect, click the "Contact our Support Team" link in the Notify us of any Errors or Omissions box. This displays the Send Feedback dialog where you can contact us about any changes.
      2. Click the Confirm button.
    2. Update the SPF records for your domains with the information displayed in the application under SPF Record, as shown below:
      SPF Record Entry
      Only use the SPF record displayed in the application for your domains, as there are regional differences (i.e. "eu" for Europe in the above example). If you're not the person responsible for this task, click the Share link to send an email containing the required detail to someone who is.
      1. Log on to your Domain Registrar.
      2. Update / replace each domain’s SPF record to specify us as the authorized outbound service.
      3. Remove all previous SPF records if all email for your domains will be routed via us.
      4. Other outbound sources for your domain may require a combined SPF record. In this instance, ensure you include the Mimecast "xx_netblocks.mimecast.com" entry before creating a mail flow connector. To determine what "xx" is, refer to step 2 above.
        See the "Implementing SPF for Outbound Email Delivery" section in the Configuring DNS Authentication Definitions and Policies page, and the Implementing SPF for Outbound Email Delivery page for additional information.
    3. Optionally test your SPF record:
      1. Navigate to Platform | Set Up Your Outbound Email in the Connect Application.
      2. Select your domain from the Record to Validate drop down menu.
      3. Click on the Validate button. One of the following messages will display:
        • A green tick confirms the SPF record is valid.
        • A red exclamation confirms the SPF record is invalid.
      4. Click on the More or Less links to view further information about the SPF record and toggle the display.
      This step performs an TXT record lookup and validates the SPF record entry. You can have more than one mechanism (IP/Host), but Mimecast must be the first one listed.
    4. Create an outbound Email Flow Connector:
      1. Log on to your Exchange Management Console.
      2. Create a mail flow connector. Read the Creating an Outbound Email Flow Connector page for further details.
      3. Ensure that all outbound emails are routed via our smart hosts listed in the application.
    5. Click the Confirm button in Connect to verify the connector. If validation is successful, a summary page of your outbound email connection displays.

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