How do I submit my HTML form by e-mail?

I created a simple form on a webpage, where I ask for visitors to enter their e-mail address and click 'Submit' if they want to be notified of an event.
When I test the form, nothing happens, apart from the re-direct to a second webpage.

This is the code I use:

<form action="info@invoiceit.com" method=post enctype="text/plain">
<input type="hidden" name=tx1>
<input type="text" name="tx2" size="27" value="enter your e-mail address"><a href="thanksforwantingcloud.htm">
<input type=submit value="Send it" name="B1"><input type="reset" value="Reset" name="B2">
</form>

What is missing to send the content of that text box to my e-mail address?

Hope you can help - thank you.