Specify Email Address Rewriting Rules

You can specify rules for changing recipients' and senders' addresses in incoming or outgoing emails prior to delivery. You can use this address mapping or "alias" facility, for example, to reroute email messages to different mail hosts in your organization, or to map one user name to another user name.

How the Gateway uses Email Address Rewriting

Secure Email Gateway uses either the original email address or the rewritten email address, depending on which area of functionality it is using to process messages.
When using... the Gateway uses...
Relay control anti-relay checks before performing any address rewriting
Hosted Domains the original email address
Validate Sender Domain the original email address
Spam control that 'only accepts messages' from a selected address list the recipient's original email address
Spam control that 'rejects messages' from a selected address list the sender's original email address
Policy Routes rewritten addresses
Outbound mail routing rewritten addresses
Message tracking

the original email address for initial events (such as 'Accepted')

the rewritten email address for later events (such as 'Delivered')
Reports either rewritten or original addresses, depending on context.
PMM the rewritten address

You can use a wildcard * to map groups of addresses.

Specify email address rewriting rules

  1. Navigate to System > SMTP Settings > Email Address Rewriting. The Email Address Rewriting page is displayed.
  2. A table in the Rewriting Rules panel displays the current email address mapping information. Click New to open the Add Rule dialog.

  3. In the dialog, specify the following information:

    • In the Original field, type the original user-specified address. You can use a wildcard * to represent components of the address (see the examples below).
    • In the Modified field, type the address to which the user-specified address is to be mapped.

    NOTE: If you include wildcards in the Modified address, they must match wildcards in the Original address.

    Explicit address mappings with no wildcards

    Original Modified
    VinceE@your-companyname-here.com vince.edwards@inside-yourcompany.com
    accounts@inside-yourcompany.co.uk

    vince.edwards@inside-yourcompany.co.uk

    Address mappings with wildcards

    Original Modified
    vince.edwards@*.your-companyname-here.com accounts@your-companyname-here.com
    *@your-companyname-here.com

    *@inside-yourcompany.com
    *@*.your-companyname-here.com  *@*.inside-yourcompany.com
  4. Click Add to add the entry to the routing table.

  5. To add additional rules, repeat steps 4 and 5.

      You can change the order of the rules in the address rewriting table. However, this does not affect the order in which they are applied.
     

    You can link rules. For example:

    Address 1 is rewritten as Address 2
    Address 2 is rewritten as Address 3

    Secure Email Gateway applies both rules and maps Address 1 to Address 3.
      If you change any configuration or policy settings, you must Apply Configuration for the new settings to take effect. You can do this either from the Changes Made panel, or System > Configuration > Apply Configuration. See Apply new configuration for more information.If you use Peer Gateways (i.e. when multiple Gateways are peered), any configuration changes from a local Gateway can then be applied to all the peers at the same time. See Configure Peer Gateways for more information.