XFOR: How to Prevent MSMail from Delivering to SMTP Addresses

• Microsoft Windows NT Workstation versions 3.5 and 3.51
• Microsoft Windows NT Server versions 3.5 and 3.51
• Microsoft Exchange Server, version 4.0

SYMPTOMS

When you attempt to send Internet (SMTP) mail using the Internet Mail service in a Microsoft Exchange client and you have Microsoft Mail with a LAN connection configured at the same time, your message will not stay at the Outbox until you force delivery via the Internet Mail service. Instead, you might receive a Non-Delivery Notification (NDN) from your Microsoft Mail Postoffice or the message will be delivered by Microsoft Mail via the configured gateway.

CAUSE

The problem occurs when the Microsoft Mail transport has been enabled to deliver to SMTP addresses through the mail gateway on the Microsoft Mail Server side.

WORKAROUND

To keep the Microsoft Mail transport from delivering the SMTP message and let the Internet Mail service deliver it via the Internet Service Provider, follow these steps:

1. Double-click the Inbox icon on the desktop to start the Microsoft Exchange client.