Cache http mail.biltechindia.com

It looks like you're trying to cache the HTTP response from http://mail.biltechindia.com. Here's how you can do it:

Using the curl command:

You can use the curl command with the -o option to save the response to a file, and then use the curl command with the -I option to cache the response:

curl -o mail.biltechindia.com.html http://mail.biltechindia.com
curl -I -o mail.biltechindia.com.cache http://mail.biltechindia.com

This will save the HTML response to a file named mail.biltechindia.com.html and cache the response to a file named mail.biltechindia.com.cache.

Using a caching proxy:

You can also use a caching proxy like squid or Apache HTTP Server to cache the response. Here's an example using squid:

squid -c -o mail.biltechindia.com.cache http://mail.biltechindia.com

This will cache the response to a file named mail.biltechindia.com.cache.

Using a browser:

If you're using a browser, you can use the browser's built-in caching feature to cache the response. Here's how:

Note that caching the response may not be necessary or recommended, as it may not be up-to-date or may contain sensitive information.