Connect Application: Setting Up Your Outbound Email

Document created by user.oxriBaJeN4 Employee on Oct 22, 2015Last modified by user.oxriBaJeN4 Employee on Nov 9, 2016
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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.

 

Walkthrough

 

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. Click the Platform | Set Up Your Outbound Email menu item.
  2. Click the Start button.
  3. Configure your Exchange to route your outbound emails through us. The process for doing this depends on the Exchange type:

     

    Office 365 / MSP

    You must have an Office 365 administrator account with permissions to create a mail flow connector.

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

    1. Update the SPF records for your domains with the information displayed in the application.
      If you are not the person responsible for this task, click the Share link on the right hand side to send an email containing the required detail to someone who is.
      1. Log in 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 _netblocks.mimecast.com entry on them before creating a mail flow connector.
        For additional information see the "Implementing SPF for Outbound Email Delivery" section in the Creating / Changing a DNS Authentication Definition page, and the SPF for Outbound Email Delivery page.
    2. Create an outbound Email Flow Connector:
      1. Log in 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 the application.
    3. Click the Validate button to verify the connector. If the validation was successful, a summary page of your outbound email connection is displayed.
      If you currently use SPF records for your domains, ensure you include the Mimecast _netblocks.mimecast.com entry on them before creating a mail flow connector. For additional information please review the "Implementing SPF for Outbound Email Delivery" section in the DNS Authentication article.

    On Premise / Hybrid

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

    To configure your Exchange to route your 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.
      If you are not the person responsible for this task, click the Share link on the right hand side to send an email containing the required detail to someone who is.
      1. Log in 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 _netblocks.mimecast.com entry on them before creating a mail flow connector.
        For additional information see the "Implementing SPF for Outbound Email Delivery" section in the Creating / Changing a DNS Authentication Definition page, and the SPF for Outbound Email Delivery page.
    3. Create an outbound Email Flow Connector:
      1. Log in 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.
    4. Click the Validate button to verify the connector. If the validation was successful, a summary page of your outbound email connection is displayed.

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