Send Quick Empty Email Messages in Gmail
Since you all know Gmail is one of the most popular email services available, you can also use it to send quick messages to your friends and colleagues without having to type long stuff in the text body area.
Every now and then, the official Gmail blog give out tips which can help you use Gmail in a more productive way. Just like the tip I shared about Web Clips in Gmail. They have again shared another tip on how to send empty messages.
Now you don’t have to type anything in the text area if you think the subject would be sufficient enough to convery your message. Just add “EOM” or “(EOM)” at the end of the subject line (short for End Of Message), and Gmail will silently send the message without the unnecessary prompt.
Tip Source: Official Gmail Blog