Exchange server actively refuses my connection

Posted by Roy on Stack Overflow See other posts from Stack Overflow or by Roy
Published on 2010-03-22T05:03:33Z Indexed on 2010/03/22 5:11 UTC
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exchange-server

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ASP.NET

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c#

I'm writing a ASP.NET application used within our company. Now I want to send emails to some users via a email account on our exchange server.

I tried to use System.Net.Mail.SmtpClient, where a proprietary account and password are given to specify the credentials. But the code failed with following exception: "No connection could be made because the target machine actively refused it"

Is that due to Exchange Server policies to prevent spam? How can I get it to work?

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