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Really stuck with this Outlook problem

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4 replies

by joegrosskopf

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I purchased 4 brand new Optiplex 755 computers. All of them are experiancing the smae issue. Dell is not helping because it is a Microsoft problem, not theirs. If any of the users open Outlook, add an attachment and do not send for a few minute, then click send the Outlook application crashes and says 'network connection lost'. The network connection is there, they can send other emails while this one is open, they can surf the Internet etc. I have looked everywhere and cannot find the cause of this problem.

4 replies

by kenone

What version of Outlook? Are you using an exchange server? How are you connecting to the world?

by Former member

Problem

When sending email through Outlook or Outlook Express, the following error messages may appear:

* An unknown error has occurred, SMTP_SERVER, lost connection to IP_Address.
* An unknown error has occurred server error 421, POP_SERVER, lost connection to port 25, 0x800ccc67.
* Your server has unexpectedly terminated the connection. 0x800ccc0f.
* Connection to the server was interrupted, SMTP_SERVER, lost connection to computer, IP_Address 0x800ccc0F.

Note: These symptoms are only related to outgoing mail. Incoming mail may be unaffected by these symptoms.

Cause

This issue may occur if the Internet connection is through a Linksys BEFSR41, BEFSR81, or BEFW11S4 router. PPPoE connections must use a MTU of 1492 or less and the router may not be using that MTU.
Solution

Set the router to a maximum MTU of 1492 or less. Information on how to configure the Linksys router with a lower MTU may be obtained here: click here.

The latest Linksys firmware updates should also resolve the problem. Please refer to Linksys for help with router issues.
Hope this helps you out.

Please post back if you have any more problems or questions.

by ic-it

Tools - Options - Mail Setup Tab - E-Mail accounts Button - Select View or change an e-mail account - Click Next - Highlight Exchange server - Select Change, then the More Settings Button - (Finally) General Tab - Verify Automatically detect connection state is checked and consider increasing the seconds until server timesout.
Gads, That was a heck of a path. ;-)

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