Managing Connectors

Bridgehead servers act as the communication relays for routing groups. They are defined both remotelythe destination of email messagesand locallythe source of email messages. Each connector handles bridgehead connectors differently. Routing group connectors can have several local bridgeheads and one remote bridgehead and can be created using the steps described in the section "Configuring Routing Group Connectors" in this lesson. SMTP connectors can have more than one local bridgehead and use smart hosts or DNS MX records to locate remote mail servers. To set up, use the procedures in the section "Configuring SMTP Connectors" in this lesson. X.400 connectors have a one-to-one setup: one local and one remote bridgehead server. This configuration is limiting, and multiple connectors must be load balancing and fault tolerant. X.400 bridgehead servers are configured through the local and remote X.400 names designated for the connector.

For all connectors, administrative tasks, such as content restrictions, delivery restrictions, and removing and disabling connectors, are performed using very similar administrative steps.

Enabling Content Restrictions

Content restrictions set priority, allowed types, and sizes for transferred messages by a connector. To enable content restrictions, use the following steps:

1.	In ESM, navigate to the Connectors container, right-click the appropriate connector, and select Properties. Then click the Content Restrictions tab.
2.	Click the check boxes to set options for message priorities, message types, and maximum message size. Click OK when you're finished setting the options.

Enabling Delivery Restrictions

Delivery restrictions are used to accept or reject messages based on the sender's email address before being transferred over the connector. No restrictions are set, by default, allowing all messages to be delivered. To configure connectors to reject messages from specific senders, follow these steps:

1.	In ESM, navigate to the Connectors container. Expand the Connectors container, right-click the connector that you want to work with, and then click Properties.
2.	Click the Delivery Restrictions tab. Under Reject messages from, click Add.
3.	In the Select Recipient dialog box, click the users, contacts, and groups whose messages are to be rejected. All other senders are accepted automatically.
4.	Click OK twice.

Tip

Selecting individual recipients can take extra time. To save time, press and hold down the Ctrl key as you select a group of recipients.

Disabling Connectors

Connectors can be disabled or removed at any time. To disable a connector, follow these steps:

1.	In ESM, right-click the connector to disable and then click Properties.
2.	To disable an SMTP connector or a routing group connector, click the Delivery Options tab. Under the Specify When Messages Are Sent Through This Connector option, in Connection Time, select Never Run from the drop-down list. To disable a X.400 connector, click the Schedule tab and then click Never.
3.	Click OK to complete disabling the connector.

Removing Connectors

Although not recommended, connectors can also be removed. To remove a connector, use these steps:

1.	In ESM, navigate to the Connectors container, right-click the connector to remove, and then click Delete.
2.	When prompted to delete the connector, click Yes.