Knowledge Base

XFOR: SMTP: IMS Double Quotation Marks Not Parsed Correctly

Article ID: 175848

Article Last Modified on 9/30/2003

Microsoft Commercial Internet System 1.0 Service Pack 2

This article was previously published under Q175848

SYMPTOMS

When you send mail to "user@investor"@MSN.com, a non-delivery report (NDR) is returned even though it is a valid mailbox. The double quotation marks are not being parsed correctly by Internet Mail Service.

CAUSE

The server did not properly handle addresses of the form

"user@investor.com"@msn.com <mailto:>

which is a legal address. When the addresses is received, it is parsed properly; however, upon pulling it back from the Routing Table, the parser was not used because the address was considered "clean" (that is, all comments had been removed, and so on). These clean addresses locate the domain by searching for the first @ sign and do not heed the quotation marks.

STATUS

Microsoft has confirmed this to be a problem in Microsoft Commercial Internet Server 1.0 Service Pack 1. A supported fix is now available, but has not been fully regression-tested and should be applied only to systems experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft recommends that you wait for the next Service Pack that contains this fix. Contact Microsoft Technical Support for more information.

Keywords: kbbug kbfix kbqfe KB175848