How to disable outbound mail for all SMTP queues

The Disable outbound Mail option enables you to disable outbound mail from all SMTP queues. This option is useful, for example, if there are active viruses in your organization.

Attention:

The Disable outbound Mail option does not disable the MTA or system queues.

Steps

Disable Outbound mail in all SMTP queues

1. Start Exchange System Manager: Click Start, point to All Programs, point to Microsoft Exchange, and then click System Manager.

2. To navigate to the Queue Viewer, do one of the following:

• If you have not already defined a route or administrative group: Expand Servers, expand the server that you want, and then click Queues.

• If you have defined Administrative groups: Expand Administrative Groups, expand < manage group names >, click Servers, and then select Queues.

3. In the details pane, click Disable Outbound mail to disable messages from all SMTP queues.

4. A warning message is displayed asking "Are you sure you want to disable outbound mail?" ”。 Click "Yes". Outbound mail for all queues is now disabled.

5. To re-enable a disabled SMTP queue, click Enable Outbound Mail, and then click Yes.

Attention:

If you need to prevent outbound mail from being sent to a specific remote queue, instead of disabling all SMTP queues, you can freeze messages in that queue. To freeze all messages in a specific queue, right-click the queue, and then click Freeze. To unfreeze the queue, right-click the queue, and then click Undo Freeze.