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You wrote: "...The requested URL was not found on this server..."
'The requested URL' means the web address you're trying to get to.
'Was not found on this server' means that the web address you were trying to get to may be out there somewhere, but it's not at this computer you've rung the doorbell on.
When you click the link or the attachment on your e-mail, that link or attachment is not set up properly to open from your mail.
The way to open it is to copy the link, paste it on the address line, and hit enter.
What to do: right-click on the attachment. A menu will appear. Choose PROPERTIES. You'll see the address (it may be called the target address). Copy that address by highlighting it, and then clicking CTRL C. Put your cursor in the address line at the top of the page. Click CTRL V to paste the address. Hit the <enter> key on the keyboard.
There ya go.
- Stuart