Scanning ASP Upload Files For A Virus

I'm creating a publicly accessable upload tool using ASP Upload and was wondering how much I should worry about Viruses.

Is it possible for files uploaded to attack the server? I was looking for a way to scan files uploaded for viruses but can't seem to find anything.

What I'd be looking for is something along the same lines of and online email systems that scans attachments for viruses.

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File Uploading And Virus Scanning

There will be a section very similar to this forum, where a user can:

1) Fill out a web based form
2) Attach a file
3) The text and attachment will be emailed (via ASPmail) to the recipient list

My Questions are as follows:

1) I'm assuming I need to first upload the file to somewhere on my server with the correct write permissions BEFORE
actually attaching it to the ASPmail, correct?

2) How can I prevent users from sending attachments with viruses? Do I just install a realtime virus scanner (like norton)
on the server and it will automatically look at the uploaded files?

3) Assuming that #2 is correct, what happens when it detects a virus? what would the email actually send? I guess I could have
norton "delete" any files with viruses, and then write the ASP code so that if it can't find the uploaded attachment (because it was deleted)
the email can include a message like "attachment was deleted due to virus" or something.....right?

I'm assuming Norton would catch it quick enough between the upload time and the email send time....

Can anyone give me some pointers?

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-------------------------------
<H2>To File System</H2>
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