XFOR: Restricting Routing in the Internet Mail Service (Q196626)
The information in this article applies to:
- Microsoft Exchange Server,
version 5.5
SYMPTOMS
The Exchange Server Internet Mail Service (IMS) allows you to configure the
server to allow mail relaying. When you enable the Mail relaying in the IMS's
'Routing' property page, all mail will be routed without restrictions. Exchange
Server 5.5 Service Pack 1 allows the administrator to impose restrictions on
routing.
RESOLUTION
To enable these restrictions on routing functionality, follow these steps:
- Install Exchange Server 5.5 Server Pack 1 (or later).
- Open the properties on the Exchange Server Internet Mail Service and
select the Routing page. After the SP1 installation, this page will
have an additional button called <Routing Restrictions...> .
- Click Routing Restrictions to bring up a dialog box with additional
Restrictions.
MORE INFORMATION
Exchange Server 5.5 Service Pack 1 adds "Routing Restrictions" to
the Internet Mail Service. This allows the administrator to specify who can
relay mail off of your Exchange Server computer.
The following Restrictions have been added:
Specify the hosts and clients that can route mail when the following conditions
have been met.
- Hosts and clients that successfully authenticate:
Messages sent from hosts and clients with valid logon information are
relayed.
- Hosts and clients with these IP addresses:
Messages sent from host whose IP addresses and subnet mask fall within the
range to be allowed to relay.
To only allow a single host or client, enter in the format, IP=>full IP
address of client< (i.e 1.1.1.1), MASK=255.255.255.255
To allow a range of IP address to relay, enter in the format, IP=>scope
to allow< (i.e 1.1.1.0>, MASK=255.255.255.0. This will allow the
address range of 1.1.1.1 - 1.1.1.254 to relay.
- Hosts and clients connecting to these internal addresses
Messages sent by hosts and clients that connect to the specified IP address
on the Microsoft Exchange Server computer are relayed. This allows
multihomed servers to restrict message relay based on the IP address to
which the client connects. If you select this option, you must disable IP
forwarding on the Networking property pages in Control Panel .
Specify the hosts and clients that can NEVER route mail.
- Messages sent from the specified IP addresses and subnet mask are NOT
relayed.
| Published |
Jan 27 1999 1:28PM |
Issue
Type |
kbprb |
| Last
Modifed |
Jan 12 2001 2:56PM |
Additional
Query Words |
rerouting spam spoof
IMS SMTP restrict restrictions |
| Keywords |
|