"405 - Method Not Allowed" error with ASP.Net based Web Service

I get a 405 error while working with ASP.Net based web service. The request synopsis is:

POST / HTTP/1.0
Host: my.machine.host.name
Content-Type: text/xml
Content-Length: NNNN
...

The problem is not anywhere else but with the request itself. To be able to appreciate the solution, one must understand the HTTP specifications.

1.0 version of HTTP does not specify any 'Host' header. It was introducted in 1.1. One needs to change the request to look something like:

POST http://my.machine.host.name/ HTTP/1.0
Content-Type: text/xml
Content-Length: NNNN
...