Exchange - Dequeue

What about Exchange?

This is becoming an increasingly popular option. Recent improvements to the product have added an option to make this a workable solution for Exchange dial-up also. With Exchange 5.0 SP1, Microsoft has added ETRN functionality to the IMS:

ETRN

Description	Microsoft Exchange version 5.0 SP1 and later implements the ETRN command to cause mail for a particular domain(s) to dequeue.
Usage	ETRN domain
Parameters
domain	Specifies the domain to dequeue
Requirements	ISP must have installed Microsoft Exchange version 5.0 SP1 or higher.  Since ETRN is simply another token that the SMTP protocol can pass, some method must be designed to connect to the host on the SMTP port (TCP 25), send the ETRN command, then quit. 1. If you have Exchange 5.0 SP1, the ETRN functionality is built into the IMS. It is configured through the "Mail Retrieval" button on the "Dial-Up Connections" tab of the IMS Properties page. 2. If you do not have Exchange 5.0 SP1, we have written a very simple NT command line utility to do this. You can download dequeue.exe (Intel 108Kb, Alpha 220Kb). The parameters are described in the program help - accessible by running "dequeue -?" 3. If you are using a Dial-on-Demand router, your options are more limited.  With Exchange 5.5, you can use the AlwaysUseETRN registry key, but only for the primary domain (from the Site Addressing tab) of the server.  If you have multiple domains, use dequeue.exe,
Example 1
Example 2	dequeue -m oak.zilker.net -d swinc.com -q

Hold for ETRN
Exchange 5.5 has the ability to hold routed mail pending an ETRN command from the downstream server.  This is configurable on a per domain basis. On the Connections tab, select the "E-Mail Domain" button to bring up the dialog.

This is also available in Exchange 5.0 SP2.