Mimecast Domain Types

Document created by user.oxriBaJeN4 Employee on Sep 10, 2015Last modified by user.oxriBaJeN4 Employee on Apr 6, 2017
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Mimecast maintains the domains you register as internal, as well as the external domains your organization exchanges email with. This article describes the different types of email domain that Mimecast maintains.

 

Internal Domains

 

An internal domain is a domain that your organization has registered with Mimecast to send, receive, and / or archive email for.

 

To list your internal domains:

  1. Log in to the Administration Console.
  2. Click on the Administration toolbar button. A menu drop down is displayed.
  3. Click on the Directories | Internal Directories menu item.

 

Internal domains fall into the following types, as signified by the icon on the right hand side:

 

Internal Domain TypeIconDescription
Remoteico_remote.png

A domain is considered remote, if the mailboxes for users with email address's in the domain are stored on any infrastructure other than Mimecast (e.g. Microsoft Exchange On Premise or Office 365).

  • Inbound emails received for a user with an email address in a remote domain, are delivered to your organization's email infrastructure via SMTP.
  • Outbound emails can be sent from a user with an email address in a remote domain, from your organization's email infrastructure via Mimecast.
Localico_local.png

Local domains are typically used by customers without internal email infrastructure. A domain is considered local if Mimecast maintains the mailboxes for users, with email address's in the domain.

  • Inbound emails received for a user with an email address in a local domains, are kept in the Mimecast infrastructure and need to be accessed using POP3.
  • Outbound emails from a user with an email address in a local domain, can be sent directly via Mimecast using an authenticated SMTP connection.

Only Mimecast Support can set a domain to be considered local.

Send OnlyN/A

This option allows your organization to send outbound emails from a domain, but not receive inbound emails to the domain. A send only domain could be used when your organization is sending email on behalf of another Mimecast customer. Users with an email address in a send only domain cannot login to Mimecast applications.

Only Mimecast Support can set a domain to be considered send only.

 

External Domains

 

A domain is considered external if it is not one of your Mimecast registered Internal Domains. They are automatically added to your service as email is sent or received by an internal user.

 

To list your external domains:

  1. Log in to the Administration Console.
  2. Click on the Administration toolbar button. A menu drop down is displayed.
  3. Click on the Directories | External Directories menu item.

 

If your organization uses the Closed Circuit Messaging or Secure Messaging features, external domains are used to facilitate authentication for recipients of confidential email.

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