My question is, how can an ASP execute a POST to a specified URL in the same manner it can Redirect?

Why do I ask this (to help clarify if I'm not asking the question well enough)?

My client's product will POST to a paging provider's web site. It converts spaces in the URI to %20, but does not convert other special characters (double quotes). We've encountered a non-commercial, proprietary, in-house (read: annoying) paging provider that refuses messages that include double quotes.

I'm trying to write an ASP that will be a simple layer between our product and thier paging host. It will parse the string that would've been sent to thier host and convert double quotes to %22. But it must do a POST to their host.

I'm afraid that doing a Redirect with the URI as a query string with do a GET.

So, how can I do a POST?