Target Skills:

Ability to configure Routing Table entries.

Ability to Specify an Address Completion Domain.

Ability to Specify Local Domains.


 
 
 

More Info:

Configuring SMTP Services (Admin Guide)

Important SMTP Settings 


There are three important SMTP service settings that we will discuss in more detail.
 

SMTP Routing Table Entries

This is one of the most useful configurations you can set, and we will do it in the exercise on the following pages.  You can use the SMTP routing table to determine how the Messaging Server will route non-local messages.  This is useful for forcing certain addresses to take unique routes through your network.  The server processes the table entries in sequential order.

The format for an entry is:

recipient_address_domain:server_to_route_to
The following example routes all internal mail through a hub server:
*.airius.com:hub.airius.com
The next example forces the use of IP addresses for frequently called servers (bypassing DNS):
hub.airius.com:[205.117.238.276]
The next example shows the use of a firewall server for all outside mail:
*airius.com:*
*:firewall.airius.com

Specifying an Address Completion Domain

If the Messaging Server receives a message that does not contain a domain name in the recipient address, it will add the domain name to the address to complete the address. You can specify the domain name to be used for address completion. If you do not specify a domain, the domain name of the machine on which the Messaging Server resides (the default domain) is used to complete the address.
 

Specifying the Domains Local to Your Server

It is very important, especially if you use virtual domains, to specify the local domains your messaging server should recognize.  A domain is local to your server if the Messaging Server knows the recipient addresses in the domain.  If a message is sent to a local domain, but the recipient cannot be found in the directory, the Messaging Server will bounce the message. Otherwise, the server will either deliver the message to a local mailbox or route the message to another server.  A common configuration mistake is not setting local domains properly.

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