Hi Martyn,
Well, since this is an ASP forum, why don't you use some ASP for that?
The mailto tag will fire at the client. All it does is invoke the client's mail application, and optionally pass in a few variables for the subject, to and other fields.
Do you already have a page where a customer can carry out the inquiry? Are you trying to find out whether the client actually uses the page?
If so, you have a couple of options. First of all (easy) you can use a form with its method set to GET. QueryString will show up in the logs of IIS, so it's easy to examine them. However, the logs aren't easy to read.
Another option is to send en e-mail whenever something interesting occurs. For an article on how to send e-mail from an ASP page, check here:
http://Imar.Spaanjaars.Com/QuickDocID.aspx?QUICKDOC=249
A third option is to store information in a database. Check out this article for more info:
http://Imar.Spaanjaars.Com/QuickDocID.aspx?QUICKDOC=165
It demonstrates how to connect to a database from within the global.asa file, but it's easy to modify the code to suit your needs.
HtH,
Imar
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Imar Spaanjaars
Everyone is unique, except for me.