Alias Addresses

Document created by user.oxriBaJeN4 Employee on Sep 14, 2015Last modified by user.oxriBaJeN4 Employee on Dec 22, 2016
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An alias address is an additional email address which can be used to contact an end user. Typically, users are set up with one primary email address, but some organizations will also create proxy or alias addresses.


This could be in another domain or in the same domain as their primary account. For companies that merge, this may often result in end users have primary as well as alias addresses.


Some organizations will want different clients to contact them on different email addresses. Generally speaking, these addresses will be redirected at the mail server level to the primary account, so that their email client will receive all emails sent to the primary and alias addresses.


Using Alias Addresses


Mimecast creates personal email Archives based on email addresses. Therefore, if emails are sent to different email addresses (primary and alias), they will be stored in different Personal Archives. As a result, it is important to link these addresses. This ensures that when an end user logs onto their primary mail address, recent messages sent to an alias (secondary) mail address are seen only on their primary mail address.


Linking alias addresses to the primary address can be done in a number of ways:


Automatically Link Aliases


Mimecast can automatically link your alias addresses to their primary address using the information gathered via your Directory Connection. When enabled, Mimecast will automatically link the alias addresses found in your network controller to their primary addresses on the next Directory Synchronization. For more information, see Account Settings. See the "Directory Options" section of the Your Mimecast Account Settings page for further details.


Using a Spreadsheet Import


For alias addresses in the same domain and across domains, a spreadsheet import can be used. See Adding Users Using a Spreadsheet Import for further details.


Manually Create Alias Addresses


Administrators are also able to manually link multiple alias email addresses to a primary email address as long as they are in the same domain. See the Managing User Email Addresses page for further details.

There may be a requirement for one account to have access to multiple archives (e.g. a name change). Administrators (with sufficient privileges) can assign multiple Archives to a primary address using Delegate mailbox access. When an end user logs on with the primary address, they will have access to these additional mailboxes. For more information, view the article on how to Configure Delegate Mailbox Access.

Unlinking of Alias Addresses


Changes may occur within your Directory structure, and it is important that Mimecast reflects any changes to the alias records during each synchronization.

  • if a primary email address is removed as part of a sync, then any aliases should be unlinked
  • if the alias is moved to another primary address, then it should be re-linked to the new address
  • if an alias becomes a primary address, then any prior links should be removed