IIS seems to send email twice

Posted by David Brunelle on Server Fault See other posts from Server Fault or by David Brunelle
Published on 2010-03-10T18:17:20Z Indexed on 2010/04/13 16:03 UTC
Read the original article Hit count: 515

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reload

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iis

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exchange

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asp-classic

Hi,

we have a request page in our website that send email to confirm the request. It seem that whenever this page is accessed, some (not all of them) are sent more than once at different time, sometime hours apart. The code (which is an old ASP page) looks fine as it sends only once to the recipient. So I doubt it's a programming related problem.

When looking at the Exchange server, the tech told me that he seems to be receiving the request twice at different time, so the problem comes from what's between the code and Exchange. My hypothesis is that IIS seem to 'remember' the page and rerun it for some reason.

Any hint on where to start?

We have IIS 6 (in french if it makes any difference) with Exchange 2007. IIS is running on a Windows Server 2003 machine (virtual machine I believe) in a DMZ. I don't know about Exchange.

Thank you.

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