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Microsoft KB Archive/100706

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Knowledge Base


SMTP: Err Msg: Read: (52) Network Dropped Connection or Reset

Article ID: 100706

Article Last Modified on 10/30/2006



APPLIES TO

  • Microsoft Mail Gateway to SMTP 2.1
  • Microsoft Mail Gateway to SMTP 3.0



This article was previously published under Q100706

SYMPTOMS

Versions 2.1 and 3.0 of Microsoft Mail Gateway to SMTP may display these messages:

ERROR read: (52) Network dropped connection or reset
SMTP_recv: system error

CAUSE

These indicate:

  • An error at the TCP or IP layer has occurred.
  • The SMTP host has gone down.
  • The network between the gateway computer and the other host is down.


RESOLUTION

You can test for these conditions by trying to "telnet" to port 25 of the SMTP router: type the number 25 after the router's IP address. If this test succeeds, the Gateway will run. If it fails, you have to bring the host or network back up, or make configuration changes as needed.

If the error occurs frequently, check the network with a protocol analyzer to determine the exact network problem.


Additional query words: 2.10 3.00 errmsg

Keywords: KB100706