Knowledge Base

XFOR: SMTP: Default Value of Outbound Connections Too High

Article ID: 160826

Article Last Modified on 9/30/2003

Microsoft Commercial Internet System 1.0 Service Pack 2

This article was previously published under Q160826

SYMPTOMS

The current default setting for the maximum number of outbound connections is 500. This value has been known to cause TCP/IP on the sending server to stop responding if the receiving server cannot handle the large number of incoming connections. Reducing the default setting will aid in preventing this problem from occurring in production environments, but will not completely eliminate it.

WORKAROUND

To work around this problem, reduce the maximum number of outbound connections to 100.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Commercial Internet System (MCIS) version 1.0. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

MORE INFORMATION

No site, not even a site with more than a million messages per day, should require more than 100 concurrent outbound connections. Even if a site does need more than 100 connections, you can make this configuration on the SMTP Service tab of the Internet Service Manager (ISM).

Additional query words: SMTP

Keywords: KB160826