Microsoft KB Archive/235316

= XIMS: IMS Storms Host When Remote Host Returns 552 Error for First Recipient =

Article ID: 235316

Article Last Modified on 10/17/2005

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APPLIES TO


 * Microsoft Commercial Internet System 1.0 Service Pack 2
 * Microsoft Commercial Internet System 2.0

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This article was previously published under Q235316





SYMPTOMS
Some Internet service providers (ISPs) use error code 552 as their "this recipient is over quota" message. Therefore, when an ISP receives a message from an SP4 Simple Mail Transfer Protocol (SMTP) server (acting as a client), an attack on their server occurs.



MCIS 1.0
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that this article describes. Apply it only to systems that are experiencing this specific problem.

To resolve this problem, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

The English version of this fix should have the following file attributes or later:

  Date      Time                 Size    File name     Platform -  06/16/99  11:29a               265,200 Smtpsvc.dll   x86 06/16/99 11:25a               401,168 Smtpsvc.dll   Alpha



STATUS
Microsoft has confirmed that this is a problem in Microsoft Commercial Internet System versions 1.0 and 2.0.



MORE INFORMATION
This fix resolves the issues by applying the following logic:
 * When the MCIS SMTP server receives a 552 error before any recipients have been accepted, it will treat this error as a per-mailbox error instead of a too many recipients error.When the MCIS SMTP server receives a 250 success value for a recipient, it will not resend the message to those recipients even when a 552 error is received for a different recipient.When the MCIS SMTP server receives a 552 after one recipient has been sent, it will stop sending the mail message to additional recipients. This keeps the MCIS SMTP server from sending messages repeatedly.

Keywords: kbbug kbfix kbnofix kbqfe kbhotfixserver KB235316

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