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Gabriel_EspinozaFlag for Chile

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How to enable outlook to open unknown files

My company has a computer system that sends some .ASP files attached to the emails. I've seen other people opening those files straight from Outlook by double clicking them.

In my case, I try to double click the attached file but instead of opening the file, it shows a window to save the file in the PC.

How can I configure Outlook 2007 to open this file by making double click on it?

as a remark, once I save the file in Desktop, if I double click it, it opens the web-browser and shows the info with no problem.
I've been told that the file is HTML, but only the extension is ASP.

In advance, thank you very much!
OutlookWindows XPMicrosoft Applications

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Avatar of Randy Downs
Randy Downs
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Should be something like this. It's an old article but the premise is still the same. Associate your extension with a program via Windows Explorer


1. Close Outlook.
2. Open Windows Explorer or ‘My Computer’ (or a similar window)
3. Click ‘Tools’ --> ‘Folder Options’
4. Select the ‘File Types’ tab
5. Locate the file extension the attachment uses and select it i.e. doc (Word documents), xls (Excel Spreadsheets), pdf (Adobe Acrobat Reader) etc.
6. Click ‘Advanced’
7. Uncheck or check (depending on desired result) the box that says "Confirm open after download"
8. Click OK, then OK again.
9. Close Windows Explorer/‘My Computer’ (or a similar window).
10. Open Outlook & try opening an attachment.
Avatar of saastech
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.ASP file are blocked because they are consider Level 1 Attachment Security Risk.  You may need to modify your registry settings to resolve this issue.

Please to the following artilce for resolution:

Good Luck!
Avatar of Gabriel_Espinoza


thank you all for the fast replies.

@Number-1: I don't have problem with that, once the file is saved, I can open it by making double click on it

@saastech: I will try the registry trick. I may have an answer the monday (friday is almost over here in Chile)

Thank you both :)
Avatar of Gabriel_Espinoza


Hello again, after a good weekend, here I am with the reply :)

I tried the tips you gave me, saastech, with no luck. Those tips only allowed me to avoid the deletion of the attached files. I need the files to be open right from outlook.

Here's a picture of the message.
any other idea?

User generated image
Avatar of joinaunion
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Open outlook then click tools then highlite macro,then choose security,here you can make the changes your looking for .
Make sure theres no checkmark  when you look in automatic download everything should be checked permit.
Now highlite e-mail security make sure allow script in public folders is checked.
Now highlite Attachment Handling make sure reply with changes is unchecked then click attachment and document previewers make sure all are checked.
What is macro security set to?

Avatar of Gabriel_Espinoza


thank you for the reply, joinaunion

I tried what you say and the problem is still there.
In Ms Outlook 2003 I could open the ASP file right from the browser, in Outlook 2007 I can't.

here are some pictures of the configs:

 User generated image User generated image User generated image
Avatar of joinaunion
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Sorry I just realized that .asp files are blocked by default in outlook.Have the sender resend the file with a different extension,like .html .doc something along those lines.
Heres a list of blocked extensions.Thats why your getting error that its a virus.
Avatar of johnb6767
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Avatar of Gabriel_Espinoza


Thank you,
This worked perfect ^^
Avatar of johnb6767
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Which one?
Avatar of Gabriel_Espinoza


I had to create a registry key with the 3 values,

here is the text of the registry:

Windows Registry Editor Version 5.00

Windows XP
Windows XP

Microsoft Windows XP is the sixth release of the NT series of operating systems, and was the first to be marketed in a variety of editions: XP Home and XP Professional, designed for business and power users. The advanced features in XP Professional are generally disabled in Home Edition, but are there and can be activated. There were two 64-bit editions, an embedded edition and a tablet edition.

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