Sending emails automatically at the click of a button

I am designing an Emergency Response page, and one of the features we need is to be able to click a button (e.g. 'Send details to embassy'), and then send an automatically-generated email to the intended recipient ($email_address) without having to go into Microsoft Outlook and click send. Is there a way to do this?

The only method I know is the one, but this opens the email in Outlook and really I need it to be completely automated.