Empty emails can be sent using various methods, including programs that interface directly with SMTP servers, allowing users to specify any subject, sender name, and email address. Some tools, like those developed in VB, utilize subclassing for SMTP communication. While many programs may expose the user's IP address, a more secure option is to create a free email account from a web service. For those seeking anonymity, using a proxy before accessing the email account is advisable. Additionally, sending emails directly to SMTP servers can be accomplished via telnet on port 25, using specific commands to format the email. Websites like sneakemail.com are also suggested for sending emails anonymously.