XFOR: Some Connection Parameters Not Configurable Per Domain (146562)

SUMMARY

You can specify some Microsoft Exchange Internet Mail Connector (IMC) options on a per e-mail domain basis using the Microsoft Exchange Administrator program. These include message delivery and message content. However, the following connection parameters cannot be specified on a per e- mail domain basis:

Max no. of Inbound Connections
Max no. of Outbound Connections
Max no. of Connections to a single host
Max no. of Messages sent in a connection

These four values can be configured in the IMC properties page using the Advanced button on the Connections tab.

MORE INFORMATION

The ability to set these four values on a per e-mail domain basis is very important to some people who want interoperability with single-threaded SMTP gateways like the Microsoft Mail 3.x SMTP gateway.

However, the only current solution, to send SMTP mail directly to a Mail 3.x gateway, would hinder overall performance. This gateway runs on MS-DOS and can only support one connection at a time. This will cause a problem when an outside host tries to make multiple connections to the MS-DOS computer because it could result in:

Many retries initiated as the IMC tries to open multiple threads to a single-threaded SMTP gateway.
Lock-ups of single-threaded SMTP gateways.
Loss of overall IMC performance because the "maximum number of connections to a single host" must be set to 1.